VTC, COPs, cam phasers? Anyone know what pins the cam position sensors come to on the ECU (so I can ohm the entire wire harness)? Also, if the engine is missing with the codes active and I rev the engine up it will come back to idle and run great. Lately it started rough idling on a cold start only. Define "Rough Idle" because it can mean different things to different people. Anyways here is a bull on rough idle and other driveability concerns see if your local dealer will perform this bull it MAY help. A failed cam position sensor will register a trouble code and light the check-engine light (CEL). If the noise intensity is more than a lightly audible knock at hot idle under 1200 RPM at engine operating temperature, replace the cam phaser. I was the main rebuilder for them and i only replaced cam bearings in 11 units i ever remember and that was when i replaced the camshafts. The idle speed may also be set too low. When installing the new Camshaft Phaser transfer the original scribe mark to the new camshaft phaser sprocket. I was well aware of the cam phaser issues that Ford's 3v engine can have. The VCT system uses a phaser to control the whole camshaft, which in turn retards or advances both the intake and exhaust valves simultaneously on each bank. For any unknown reason,the Fuel injector system (when truck is stopped),cut send the normal fuel needed to the intake manifold and appear the idle because. But, if the outside temperature gets into the upper 90s, I'll have the rough idle when I'm stopped at a red light somewhat consistently. The rough idle almost sounds like a knocking of some type. Having a a major dilema with a rough idle / Multiple Cylinder Misfire on my 2001 Chevy S10. it can cause the vehicle's engine to run. There was no rocker arm/lifter noise through out the whole disaster, and it lasted probably a year (10,000 miles maybe) from start to finish, staying away from high rpms during that time. I try to advance the throttle while I'm trying to get the engine to run. Unfortunately, these cam phasers wear and cause various rattles and clicking noises from the engine in 2004 to 2008 F-150 models at low oil pressures, like at idle. When I first start the engine it runs great, and idels in great. A misfire will cause the engine to momentarily stumble, or lose rpms, and then regain its normal engine speed. Pull codes if all else fails and post back up. I have noticed once in a while my truck will lope like it has a big cam in it or something. Not surging, but a funny sounding rough idle. The problem: affected vehicles may exhibit sporadic rough idle, and/or a rattle noise while driving accompanied by a lit check engine light in the instrument panel. However, after anywhere from 60,000-100,000 miles, they also cause rough, loud idling due to wear and tear. So I found that the limiters limit the retard to 20* max camshaft retard. Ran great for a week and the same problem occurred, once the check engine light started flashing I knew it was a misfire. 2002 Ford Focus Idle problem 2002 Ford Focus SOHC My daughters car started a couple of weeks ago, when the car warms up its hard to get accelation at a stop and idle rough. Basically you are driving down the road fine and then all of a sudden someone flips on a run like crap switch then after a little while it clears up and runs perfect again. Looks like your idle speed is really low, to begin with. Installed the battery, it started quickly. As I'm driving, the motor just drops in RPM and then recovers after a split second. So, don't jump to any conclusions regarding the variable valve timing (VVT) system. They don't begin to retard anything until over. If the noise intensity is more than a lightly audible knock at hot idle under 1200 RPM at engine operating temperature, replace the cam phaser. 7 Idle surging,stalling in the alt. On my TB (80mm Edelbrock) I adjusted the idle bypass screw so that the Idle Control Valve sits at 50 steps at idle. P0340 Camshaft Position Sensor Circuit Malfunction P0341 Camshaft Position Sensor Circuit Range/Performance. Either of these conditions can lower the engine's efficiency and cause the "Check Engine" light to glow. The trouble code is P0340, although other trouble codes may be stored as well. Rough engine idle. Also, i know i have an exaust leak, because some starter sprayed into the leak will cause the engine to idle up, and coincendentally run smooth. What causes a rough idle? A rough idle can be caused by many different car faults. Well neither does a cam phaser, and that noise your hearing is the phaser yelling at you to buy new furniture! Just joking but you get the point. While the cause can typically be linked to the cam phasers, solutions to the problem vary widely. Rough idling is a common problem, of which the exact cause can be difficult to diagnose, as several factors may come into play. 9L (vacuum leak on cyl 1 causing a lean misfire at idle). Ran rough at first stop after driving expressway (no light on), then next time driving light came on (no speeds over 35 mph and running smoothly) - code P0012 (cam position sensors have been replaced twice). This only happens when its cold. The owner of this vehicle was very lucky that the material from the failed plug didnt cause more damage and that you were able to diagnose the issue using non invasive methods. Hard to say without being able to put hands on it and more history. I have a 1993 F150 5. Cam phaser part number changes Are you living under a rock? The gen 1 engine ecoboost had several different part numbers for the cam phasers. Problems with idle speed—things like slow idle, fast idle, rough idle, or stalling after idling for a few seconds—are symptoms that something is wrong with your engine. A bad hose in any part of the engine is easy to fix. The battery was dead when I got it, sticker indicated a 2004 date so not suprising it wouldn't work. That leads to an out of time engine with valve damage and metal particles throughout the engine. I guess I fixed the problem. It would idle rough, but once it got above 2000 rpm it would smooth out. Honda Accord: Why Does My Car Idle Rough? Your car is in "park," so why does it want to drive? This article will discuss some of the potential causes and solutions to fix this stubborn car problem. If I can't find a vacuum issue or obvious ignition issues, my experience with GM engines that have variable valve timing systems is that those actuators often cause bad idle performance and don't tend to throw anything but misfire codes (side note: I don't know how ARB let them get away with this). It gets better after it warms up. Before I go spending money replacing oil pump, water pump, chains, guides, tensioners, phasers, and everything else in that area I was just wondering if it's anything that will cause damage or is it just a noise issue?. Continuous versus discrete. Idles fine but you can't drive it until the coolant temp gets to 90 degrees or just runs really rough and stumbles. It requires more intensive inspection. Resist the urge to adjust the TB set screw for low idle concerns. In addition, these vehicles also exhibit a rough engine idle. Took the RT out of storage yesterday. Even without the lockout the phasers are fully advanced at idle. There are no PCM attempts to re-sync with either sensor. Its a V6 4. Light on during 4th time running since plugs replaced, code P0022. If I can't find a vacuum issue or obvious ignition issues, my experience with GM engines that have variable valve timing systems is that those actuators often cause bad idle performance and don't tend to throw anything but misfire codes (side note: I don't know how ARB let them get away with this). Ford Triton Cam Phasers Many owners of Ford cars, trucks and SUV’s with the Triton engine (4. Rotating one cam sprocket disturbs valve timing relative to the other side of the engine. The engine RPM will fluctuate which can directly result in a reduction of power generated by your car. A Bad EGR, the EGR is leaking and causes horrible idle speed misfire/stalling and flooding or spark plug fouling. To get the air/fuel mixture in the engine and the exhaust out at high rpm, race cars need a camshaft with as much lobe lift and as many degrees of duration as possible and a narrow lobe-separation angle, which results in valve overlap. The the Camshaft Syncro Shaft (Camshaft Synchronizer) is on the top back passenger side of the engine. The engine is the original 351C-4V but has an Edelbrock Performer intake and carb installed. If your truck dies out while driving at speed, you need to check fuel pressure. Also can not get over 30MPH or so unless I accelerate extremely slow. I have read almost every article and threads on the Internet about this problem, but haven't found a working solution for my setup. Ran the motor for 10 minutes with the MAF. I just took it out for a test drive and it does not appear to be doing that anymore but instead there is an incredible flat stop just off idle. Neglecting oil changes will cause wear on the camshaft and camshaft journals and a corresponding drop in oil pressure. The idle speed may also be set too low. This seems to be a problem in some Mini Cooper models. The truck runs fine from what i can tell. It will help with two things. This rattle and other issues with the VCT solenoids can lead to broken vanes in the phaser assembly, stuck phasers, loss of power, erratic idle, etc. 4L with 85k on it. Before the reset with the engine sitting at idle it would start running rough and then start surging until it stalled. RE: Rough idle and sputter IP: Logged Message: I'm having rough idle and it feels like it hesitates a little during acceleration. Here is the work that's been done so far. Opening the intake valve while the exhaust valve is still open may cause unburnt fuel to exit the engine, leading to lower engine performance and increased emissions. What are signs of a bad Throttle Position Sensor? Acceleration issues: A bad TPS may cause all sorts of power issues. It requires more intensive inspection. Truck has rough idle for about three weeks. people say cam phaser however that is so unliikely as to be ridiculous, since the engine does not knock like a cam phaser. For any unknown reason,the Fuel injector system (when truck is stopped),cut send the normal fuel needed to the intake manifold and appear the idle because. I have the cam phaser delete and sct x4 tuner installed from a well known shop in my town. Even if this fault code was with the phaser you would still need to replace the VCT solenoid, With P0016 this would have a rough idle condition, and if it accompanied by one or more VCT solenoid codes such as P0011, P0012, P0016, P0018 , P0021, P0022,. So I found that the limiters limit the retard to 20* max camshaft retard. Basically you are driving down the road fine and then all of a sudden someone flips on a run like crap switch then after a little while it clears up and runs perfect again. While causes for such sounds can be numerous, owner experiences have shown that the most likely reasons can be blown out tensioners, a loose timing chain, and cam phaser breakage. The truck would rattle and idle rough but when you accelerated, it would stop. The reason I suspect the camshaft position sensor is 1) virtually everything else has been replaced and/or tested, and 2) disconnecting it has no. Installed the O2 sensor. Misfires are often caused by a bad spark or a faulty air-fuel mixture. Problems with idle speed—things like slow idle, fast idle, rough idle, or stalling after idling for a few seconds—are symptoms that something is wrong with your engine. Also, i know i have an exaust leak, because some starter sprayed into the leak will cause the engine to idle up, and coincendentally run smooth. putting air con, sort of alleviates the problem. Hey i have a 2003 CL type S and i have low compression on three cylinders do i have to rebuild the engine or is it cause of a bad timing belt? This started happening when i change the coils and spark plug. Cleaned mass airflow sensor, cleaned throttle body, changed vct solenoids, changed cam positioning sensors, checked for voltage leaks. Rough idle. If the oil pressure is BELOW 25-psi, the VVT system will malfunction. This causes different symptoms depending on how badly worn. It is running a little rought. These OEM phasers are the latest revision that Ford recommends. Below in the diagnosis and repair tips section we'll talk about what it takes to remove the camshaft position actuator so you can verify the holes are plugged with sludge. If it stalls it starts right back up. Try cracking the throttle to see if the motor will start. international knows they have this. had to drop the tank, and boy i dont want to do it again anytime soon. Clean the TB, MAF, IAC, run seafoam through it, find the vacuum leak and fix it, oil change, filter change, see if the misfire is from the spark plug or not, but first change the Cam synchro, or you'll be in a world of shit. It bucks now and will not accelerate, and has a very bad loss of power, so they called me to see if I could figure out the problem. I tore engine down found a bad phaser on bank 2, chain guides shattered and down in oil pan so I dropped oil pan cleaned it out, installed new chains, guides, tensioners, oil pump, phasers ( when I installed the new phaser on bank 2 cam shaft I noticed that the dow pin felt sloppy so I. The variable valve timing camshaft actuators may stick due to dirty engine oil or a faulty control solenoid. Replaced all 8 spark plugs and coils. When air enters the engine that hasn't passed through the AFM the engine doesn't know its there and will run lean. If this still doesn't solve the problem, then there must be a problem in your cam phaser (stuck open) and may need replacement. Continue reading to diagnose why your Accord's engine is revving while it is parked. Treating with Stiction Eliminator will clear out all of the stiction gumming your injectors. 4 3v has inherent phaser issues, which i believe is caused by low oil pressure (i may be wrong) this causes advance and retard issues, The vehicle in question will try to stall on deceleration and also developed a slight knock prior to changing the shells. Mercedes-Benz E-Class and E-Class AMG: Why Does My Car Idle Rough? Does your engine idle rough? Read our diagnosis to learn if your MAF or oxygen sensor is the culprit. Defective camshaft phasers are a common problem and will cause the variable valve timing to be off just enough to cause rough idling or misfiring. The actual cause of all the problems is the oil pressure drops to low at idle and will not advance the cam shaft for low rpm speed, causing a miss diagnosed problem of the cam timing being out by one tooth. VVT and Cam Phasers. All designed and engineered by Livernois Motorsports for late model perfromance trucks, cars and SUV's. The truck would rattle and idle rough but when you accelerated, it would stop. I dont know if this is from the rough idle, but the car will drop down below 5K rpm and then jump to about 12K before going back down to idle. Leaving work today after car had been sitting for 7 hours, I started it and pulled up to the light, about a couple hundred feet away from my parking space. Drove it for a few days and it would misfire at idle but accelerate with out hesitation then for a few days it cleared out, well I moved and didnt drive the car for about another 4 months, then when I came to move it I tried to turn it on and the motor would turn over start for about 2 seconds and die. 7 Idle surging,stalling in the alt. Occasionally on cold startup the engine has a loud rattling noise and a substantially rough idle. sometime it is hard running on first gear and sometime it seems smooth. Then your carb is going to need to be leaned out at idle as much as possible and that cam is going to idle pretty close to 950 to 1000 rpm in park. 4 liter engine that was stalling at idle and had a surging condition at lower engine rpms. Let's go over each of these causes in more detail and learn how they can be remedied. Still rough & light came on again so I changed plugs, fuelfilter, still the same. Our designs offer the highest quality, and versatility in the marketplace with more solutions available than anyone in the marketplace. Your engine's optimum idle speed is the RPM that allows the lowest possible engine speed while allowing a stable idle. after that i took it to my local ford dealer and they cam e back with a cam phaser problem that would. Neglecting oil changes will cause wear on the camshaft and camshaft journals and a corresponding drop in oil pressure. This system is fairly complicated so check out the full description an operation of the Ford 5. 8L) have experienced a rough idle along with a knocking sound at low engine speed. Reset Idle Learn = The Idle Air Learning can be reset to a default value (16 steps) – by setting this control value to 1, and turning the key off and waiting for the system to completely power down. Skewed rail pressure readings will usually not cause a hard start. Car is a 1988 Mondial 3. More than 20% idle time is excessive. Typically, when your vehicle is running with these codes and symptoms, it's due to faulty camshaft phasers that need replacing, or the timing chain is worn out. 4 VCT Phasers. I recommend only using Ford OEM phasers for the 5. Inspecting the Camshaft Phaser, visually inspect the camshaft phaser and sprocket for squareness. 4 3v triton. The most common symptoms of Bad spark plugs are rough idle, rough acceleration, misfires, hard starting condition, poor fuel economy and you will probably experience a Check engine warning light on your dashboard. Truck ran great up to about 155,000 miles, all of the sudden came a horrible rough idle. When it was adjusted for cold starting, it did not release enough when warmed up. Honda Accord: Why Does My Car Idle Rough? Your car is in "park," so why does it want to drive? This article will discuss some of the potential causes and solutions to fix this stubborn car problem. and when I think it's swithcing from OL to CL. Misfires are probably one of the most common reasons when it comes to rough idle. Sometimes, vacuum lines cause a rough idle due to a vacuum leak, and these lines are also simple to replace. If I can't find a vacuum issue or obvious ignition issues, my experience with GM engines that have variable valve timing systems is that those actuators often cause bad idle performance and don't tend to throw anything but misfire codes (side note: I don't know how ARB let them get away with this). 9L (vacuum leak on cyl 1 causing a lean misfire at idle). Well neither does a cam phaser, and that noise your hearing is the phaser yelling at you to buy new furniture! Just joking but you get the point. The truck, when I come to a stop and idle, will drop down to 500-450rpm and if in put into park, even lower and usually die. The culprit is almost always the camshaft actuator solenoid valve, not the crankshaft position sensor or a cam position sensor. Treating with Stiction Eliminator will clear out all of the stiction gumming your injectors. Bank 1 is the side of the engine that contains cylinder #1, the "B" sensor is most likely the exhaust camshaft side. Basically you are driving down the road fine and then all of a sudden someone flips on a run like crap switch then after a little while it clears up and runs perfect again. If your super duty has a start up rattle in the front of the engine that lasts for 1 to 3 seconds, replace the VCT Phaser Kit. It's possible that it can cause the camshaft sensor to produce a false signal since the crankshaft and camshaft won't be synchronized. Either of these conditions can lower the engine's efficiency and cause the "Check Engine" light to glow. Replaced sensors (twice!). When I put the car in drive and get down the road 100' or so, it starts missing, and if I give it a lot of gas it backfires through the carb. It bucks now and will not accelerate, and has a very bad loss of power, so they called me to see if I could figure out the problem. A well known problem with the Ford 5. I have a 2004 F150 with Triton engine. It feels like a small hesitation when starting from complete stop, but power is mostly fine. Misfires are often caused by a bad spark or a faulty air-fuel mixture. P0340 Camshaft Position Sensor Circuit Malfunction P0341 Camshaft Position Sensor Circuit Range/Performance. when the motor takes RPM it seems ok, but when back to idle, the exhaust "cough"; ignition seems not too bad. Drove it for a few days and it would misfire at idle but accelerate with out hesitation then for a few days it cleared out, well I moved and didnt drive the car for about another 4 months, then when I came to move it I tried to turn it on and the motor would turn over start for about 2 seconds and die. How your engine idles is a good indicator of its overall health; addressing the problem sooner rather than later and checking all potential causes is important. Leaving work today after car had been sitting for 7 hours, I started it and pulled up to the light, about a couple hundred feet away from my parking space. I noticed during low speed cruising it would hesitate for a split second the same feeling I get when my fuel injectors shut off going downhill. We used to recommend the Precision Auto CNC phasers because the OEM phasers weren't packaged very well, which caused issues. I got tired of the car running kind of rough with no O2's, so I bought some new ones early this summer. A Bad EGR, the EGR is leaking and causes horrible idle speed misfire/stalling and flooding or spark plug fouling. that was a month ago. after that the truck threw a p0300 code. So I changed the 7 coil. if you put it in N/P the rough idle is still there but not as bad. For any unknown reason,the Fuel injector system (when truck is stopped),cut send the normal fuel needed to the intake manifold and appear the idle because. Problem reoccurred within 40 miles of getting car back, with rough idle even worse than before. If your truck is missfiring as bad as you say it would certainly set a missfire code or show missfires on each cyn with tech-2 data. When light came on after first set of sensors replaced, truck was taken to dealer. Misfires are probably one of the most common reasons when it comes to rough idle. The M54 6-cylinder engine in your 525i uses two camshaft position sensors; one for the intake cam and one for the exhaust cam (this also applies to the M52TU engines). 4L - Last summer while sitting in traffic, waiting on the on ramp to the freeway, my truck started to idle really rough. Its not a huge deal, just an annoyance, you start it the first time when cold and high altitude it runs rough for a second and stalls, then you start it again and it stays running. The first sign of the problem was the service engine light would blink intermittently when driving on the highway or revving the gas. 6L F-150 Mustang Expedition OEM Camshaft Cam Phaser Sprocket 3R2Z-6A257-DA. the result was a misfire in cylinder five. That same concept morphed into the gen 2 engine ecoboost. the following is new, wiring loom, coil packs and plugs, cambelt kit (timing is spot on), ecu, knock sensor, cam sensor,battery, earth points cleaned, throttle body reset and cleaned, fuel pump relay, fuel pressure regulator,valve seals. I do 100% believe I have the cam phaser ticking. Had recently filled up and thought it might be bad gas. The Cam Phasers would be expensive. A bad IAC may cause a no start condition. The reason race cars have that rough idle is because the engines used are designed for high-rpm operation. You may not have enough base air flow at idle at the mo. Inspecting the Camshaft Phaser, visually inspect the camshaft phaser and sprocket for squareness. Remove the plug and install a mechanical oil pressure gauge. There are several ways to diagnose a wiped lobed, but the most effective is to just pull the valve cover off and check the cam's lift directly. The rpms are not jumping (sitting at about 800). The idle speed may also be set too low. Often, the right phaser is noisier than the left. Drove it for a few days and it would misfire at idle but accelerate with out hesitation then for a few days it cleared out, well I moved and didnt drive the car for about another 4 months, then when I came to move it I tried to turn it on and the motor would turn over start for about 2 seconds and die. Not surging, but a funny sounding rough idle. For those wishing to see the VCT phaser disassembled can read this 5. I listened to t. apparently a bad diode or voltage regulator sends a noisy signal through the harness and the cam sensor reads this as a fault. The culprit is almost always the camshaft actuator solenoid valve, not the crankshaft position sensor or a cam position sensor. In the past couple of days, the Jeep (at times) has become hard to start. World’s top manufacturer of performance camshafts, lifters, valve springs, rocker arms and related valve train parts for all race and street performance engines. Try the cheaper causes first. While the engine oil temp is cold, the phasers have a built in lock out. Its a V6 4. This can cause a rough idle can set diagnostic trouble code (DTC) P0300 and codes for lean and rich operation. A well known problem with the Ford 5. Call to schedule an appointment today! As with many car issues, the root cause of a rough idle can either be a quick, easy, inexpensive fix, or it can be something more serious and costly. Not "lobey" as you describe. When this code occurs this is more of a camshaft VCT solenoid stuck in position. When the DPFE sensor is failing or goes bad, it causes rough idling, a reduce in power, and it may cause the "check engine" light to come on. Most VVT systems are not active at idle, and only come into play at higher engine speeds or when the engine is under load. Possible Symptoms: Hard starting. It may appear to work but when the weather gets cold, a high idle will result. this beauty runs really bad; bad idle, misfire?, motor and exhaust shake, exhaust flow is rough and irregular. Bear in mind that cam phasers are part of the Variable Valve Timing system which is an important component of the 5. My brother who drives a nearly identical Grand Cherokee, and is a mechanic, said he thinks it's the coils. 2 just wondering if anyone has some good news for me i idle at like 150-250 RPM really stressful and starting to lose some hair over it. When I come to a stop the idle is off, it almost feels like it is mis firing. But, if the outside temperature gets into the upper 90s, I'll have the rough idle when I'm stopped at a red light somewhat consistently. Bad thing was the debris was metal shavings from the crank thrust bearing chewing itself up. More than 20% idle time is excessive. The owner of this vehicle was very lucky that the material from the failed plug didnt cause more damage and that you were able to diagnose the issue using non invasive methods. He connected his computer for diagnoses. If your super duty has a start up rattle in the front of the engine that lasts for 1 to 3 seconds, replace the VCT Phaser Kit. I have a 2002 Chevy Trailblazer that's idling rough. But in that thread roadie posted: Dirty throttle bodies and crappy CPAS solenoids are the typical causes of low/erratic idle. But, if the outside temperature gets into the upper 90s, I'll have the rough idle when I'm stopped at a red light somewhat consistently. 2002 Ford Focus Idle problem 2002 Ford Focus SOHC My daughters car started a couple of weeks ago, when the car warms up its hard to get accelation at a stop and idle rough. Now it won't even get above 2k rpm in gear, just wants to die. Rotating one cam sprocket disturbs valve timing relative to the other side of the engine. and it started just fine. There have been reports of rough idle and fluctuation as well. A positive crankcase ventilation or PCV valve can cause an engine misfire, especially at idle and worse when the engine is cold. If the concern is a jerky, irratic idle when hot, unplug the ICP sensor (will set a code, causes the PCM to default to a pre-selected IPR duty cycle) to see if it the idle stabilizes. CarComplaints. You may need to rotate the engine crank to move the phasers in position. sometime it is hard running on first gear and sometime it seems smooth. Oil and filter change is extremely important when you replace either the phaser or the oil flow control valve, as dirty oil may cause a buildup of sludge in the valve and phaser. Removing this slack on one side of the chain also causes the cam sprocket (3) to rotate and change camshaft timing on that bank. If you hear the slapping, that is the timing chain slapping. Cam phaser issues were a common problem on certain 3 valve Ford engines, and the design has been updated since. Most VVT systems are not active at idle, and only come into play at higher engine speeds or when the engine is under load. Ran great for a week and the same problem occurred, once the check engine light started flashing I knew it was a misfire. If a phaser failed or jumped timing I would think it would run bad all the time, no? It sure did when the old phaser was failing, then it threw the timing chain through the passenger side valve cover. FORD F-150 FIXED ROUGH IDLE / STUCK VCT SOLENOID PART 1 Cam Phaser Lockout Installation Triton 4. Problems with idle speed—things like slow idle, fast idle, rough idle, or stalling after idling for a few seconds—are symptoms that something is wrong with your engine. It will cause. 4L - Last summer while sitting in traffic, waiting on the on ramp to the freeway, my truck started to idle really rough. There is supposed to be a locking pin that prevents this, but some do not function for whatever reason. The problem: affected vehicles may exhibit sporadic rough idle, and/or a rattle noise while driving accompanied by a lit check engine light in the instrument panel. If your super duty has a start up rattle in the front of the engine that lasts for 1 to 3 seconds, replace the VCT Phaser Kit. Also, if it's only been occurring since the last fill up, could be bad gas(or consistently bad gas from one location). It was a super clean truck powered by a 3v 5. But again, many causes for that would be evidenced in the OBD codes. The culprit is almost always the camshaft actuator solenoid valve, not the crankshaft position sensor or a cam position sensor. I have a 2004 F150 with Triton engine. I guess I fixed the problem. I went to auto zone to see if it was a misfire but the scanner returned P0014 which could have been multiple things but the guy at the counter said most common is the cam position sensor. The first sign of the problem was the service engine light would blink intermittently when driving on the highway or revving the gas. I have 2008 f150 with 5. a common occurrence on this vehicle. sometime it is hard running on first gear and sometime it seems smooth. The camshaft is the heart of an engine, and it influences all the other. 4 engine deserves to be addressed in a separate post. Timing chain wear often gets misdiagnosed and may cause a rough idle, a lack of performance, reduced fuel mileage and several check engine light codes. The truck would rattle and idle rough but when you accelerated, it would stop. 2002 Ford Focus Idle problem 2002 Ford Focus SOHC My daughters car started a couple of weeks ago, when the car warms up its hard to get accelation at a stop and idle rough. The the Camshaft Syncro Shaft (Camshaft Synchronizer) is on the top back passenger side of the engine. Hard to say without being able to put hands on it and more history. I went to other Ford dealer in my city and they said the same. Also, the idle is rough, but not super nasty. There could also be something wrong with the vehicles' electrical components. The million dollar question is why the heck is the ECU doing this to my spark timing? The only reason I could think of for it to do this would be overheating and pinging / detonation, but I'm pretty sure I don't have either. Call to schedule an appointment today! As with many car issues, the root cause of a rough idle can either be a quick, easy, inexpensive fix, or it can be something more serious and costly. If your truck is missfiring as bad as you say it would certainly set a missfire code or show missfires on each cyn with tech-2 data. A bad lifter will cause what you describe, when you check the rockers after it's warmed up, are the adjustments still in spec ? Nothing's loose ? If there is, then I'd suspect you've wiped a cam lobe, which will take the lifter too, wearing the bottom of the lifter until there's a new oil hole in the bottom. At 180,000 I rebuilt the engine and the guy did a CAM PHASER LOCKOUT as part of the job. emissions are fine, compressions are 13 bar for all 4. When the truck is at idle at a normal operating temp, it has a horrible knocking noise on the passenger side of the engine. And keep in mind that the most rough idles issues come from lack of proper maintenance. But my question is, could the exaust leak cause rough idle. Carbon tracks on the spark plug and spark plug boot. The cam and crank should be precisely timed together. after that i took it to my local ford dealer and they cam e back with a cam phaser problem that would. A bad IAC may cause a no start condition. Livernois Motorsports offers a complete line of Cam Phaser delete systems, as well as individual components for Phaser Lockouts, Limiters, and associated hardware. Poor fuel economy. Trailblazer Camshaft Position Sensor. Same issues. Another common cause of rough idle is a bad flywheel or bad camshaft. A video wouldn't help me zero in on which of those items, but. But you may want to get a second opinion to make sure you are making the correct repair for your model. emissions are fine, compressions are 13 bar for all 4. Drove it for a few days and it would misfire at idle but accelerate with out hesitation then for a few days it cleared out, well I moved and didnt drive the car for about another 4 months, then when I came to move it I tried to turn it on and the motor would turn over start for about 2 seconds and die. Most of an engine's character comes from how far its intake and exhaust valves open, how long the stay open, and when they open and close. The main problem is, the car is refusing to run smooth at idle. Cam phaser may be stuck in full advance position. Check engine light came on about two weeks into it. Continuing to drive the vehicle in this condition can cause severe damage to multiple internal engine components. that was a month ago. This seems to be a problem in some Mini Cooper models. common type use a camshaft actuator or "phaser" mounted on the cam drive gear, and an oil flow control valve solenoid that routes oil pressure to the cam phaser. So, if none of the above is the cause, what else might be causing the rough idle? I was thinking it could be a vacuum leak (where might it most likely be after the heads have been removed and installed), a bad TPS or MAP sensor, or a bad IAC motor (though the mechanic said he did not touch the throttle body at all). The overall silhouette of the lobe is the key. This only happens when its cold. The problems on initial batches of the Subaru BRZ coupe and its Scion FR-S twin--known. Engine light has been coming on for about a month. If your super duty has a start up rattle in the front of the engine that lasts for 1 to 3 seconds, replace the VCT Phaser Kit. I put mobil 1 full synthetic extended mileage oil in along with RESTORE engine oil additive. putting air con, sort of alleviates the problem. it get around 500 miles or less a year towing i will change oil in the fall and spring around 5k. Probably the most common problem that causes idle problems in multiport fuel injected engines is a carboned-up throttle body. so in the end, it appears that indeed, a bad alternator can truly cause the P0340 code. If you live in a state with vehicle emissions testing, this may be the reason why your car fails the test. This is a problem in 2 camshaft motors. Based on your video, it is not possible that the noise you are hearing is the result of the cam phasers failing to park in their locked position. The idle might smooth out for a minute or too but then gets really rough again. 4 3v triton. Poor fuel economy. Carbon tracks on the spark plug and spark plug boot. Previous owner had had problems with the fuel injectors needing cleaning. Rough idle and stalls after 10 minutes with O2 sensor.