Checked for vacuum leaks with carb cleaner: none found 2. My car has 195000 miles. Q: My car has a misfiring problem when completely cold. Optional Information: 1989 Toyota corolla 1.6 Already Tried: change plugs wires cap rotor fuel filter Veh has 6,500 miles on. cyl. There was some oil found on the coilpack when it was pulled out. November 22, 2013 at 5:45 am #558391 I purchased a 99 Saturn SL2 last August. Car misfires when humid or raining and it is not the ignition cables or the spark plugs.
Engine is rthe 3.5 V6. Random misfire on my 1997 GMC Sonoma, 4.3L Vortec engine. When the car has stood still for a couple of days, I can be pretty sure it will misfire. The Google search referred to is regarding parts of the country that have cold ambient winter temps as the Alcohol based fuel hates cold outside temps. Hello All, A few days ago my 2004 Honda Odyssey started running very rough for a few seconds whenever it was cold started. Here are the things I have tried / points of information. Jump to Latest Follow After replacing the intake manifold we haven't had one issue with rough idle in cold weather - completely healed!! This is the result of moisture building up in the distributor cap, which produces an uneven electrical current, and the engine misfires. I also think it's a very rudimentary FI system that probably isn't as advanced as a car's. My car has an automatic transmission. Rattling on cold start. Over the last week my car has been misfiring on cold starts and idling around 1200rpm before settling down. The repair was quite expensive, but it was cheaper than buying another used car - about $1,800 for manifold, coils and a few other items that needed replacing at 185,000 miles. \015 The misfire occurs at 2 minutes after initial cold start and lasts 15 to 20 seconds. The Check Engine light also comes on. I’ve been logging the cold start misfires for the last few days and have noticed a correlation between the outside ambient temperature and how many misfires cylinder 4 gets. Misfires happen at any rpm. While driving, pay close attention to how your engine is running. driving from cold, after short warming by choke, there is not able to idle and usually stall at crossings; at hilly road, no power and misfire (mostly P0304, less often P0303, occasionally P0300, P0301, P0302) warming engine ends above mentioned problems, car runs fine; engine idle is rhytmic pulsating 50rpm up/down, frequency cca 0.5 Hz Engine misfires can be a mysterious, frustrating problem—and information around them often makes them sound worse than they are. please help. That pattern continued for about three days. Leakage of 20% or more would be out of specification. If there is too much fuel and not enough air, the mixture is said to be too rich. All cars have quirks! That continued until I got home. Sure enough yesterday morning … As the engine gets older, it starts to rattle more and more during cold starts, and this is a sign that the timing chain is worn. This is often due to a timing chain attached to the engine. hi. rpm 800. i clean trottle and change too, nothing change. The extra stress of humidity or water spraying around pushes it over the edge from its "just about working OK" state when everything is dry. Leaving a car in a garage before rainy weather helps to … then at operating temp?, idle goes up & seems stable. More when hot outside than cold. thank you. You may want to monitor fuel pressure when the engine starts cold. My engine light immediately came on, and my engine started to misfire. ! and I get spark to the plugs. Cold start misfires & carbon cleaning QV at 6,000 miles? Starting the car at this point is very ok, even when after 5-7 hours, will still fireup/ignite well. 1. Same issue here from day 1 (I have only the stock tune BTW), but not when it's below 20-something degrees F outside. A wave of water came over my hood and windshield. Perform a cylinder leak down test when the engine is cold. and # 4 & 6 dont change the idel. The fact that it only happens at idle and goes away and only when it’s really cold out is almost 100% a sign you need or carbon cleaning. When a misfire occurs, take note of the circumstances such as whether the engine is cold or has warmed up; the speed at which it occurs (low speed or high speed); the frequency it occurs; and if it occurs … However, during cold weather it doesn't misfire at all. New plugs, coils, injectors, cam sensors, oil control valves, O2 sensors all on driver side bank and cat converter. Having looked online it seems that the most probable cause if cold misfires is injector issues at around £200 each. An ignition system problem is one of the most common reasons for an engine to misfire. rpm problems when engine warm. It may be a coincidence, but the problem started when the weather was getting colder (temperatures dropping below 10°C or 50°F). 1989 toyota corolla misfires. As the spark plugs, ignition cables, distributor cap and rotor, and ignition coil wear over time, their ability to transfer the needed spark to ignite the air-fuel mixture inside the combustion chambers becomes compromised. -It goes away after i restart, Its almost like when i first start my car up cold, it will misfire like one piston and i can feel it, and if i brake then more will misfire putting it into limp mode and the ETC light flashes (This post was edited by domthedurango on Nov 30, 2012, 1:27 PM) Coolant temp sensor looks good, from outside temp when cold up to the normal operating range all the way to the fan kicking in Map sensor _appears_ normal, reads 101 kpa/1 bar/14.6psi (am just above sea level) engine off to 33kpa/.33bar/4.79psi at warm idle Timing is correct, have quadruple checked this Mat Sensor reads correctly The next morning when I started the car, the engine light came on and the car misfired. For example, the misfires may not occur at all when I have driven the car the day before. Some modern engines naturally rattle very strongly during a cold start. Once warm it'll start up smooth every time. Hello All . My car has been misfiring randomly at idle and occasionally but not often at operating speed/rpm. When it’s 34F degrees or below, cylinder 4 gets between 0 and 4 misfires on cold … If I leave it parked outside in cold, I don't have the problem. After warm it drove fine. My Renault Scenic misfires - but only when it's cold outside I have a Renault Scenic 1.9dCi on a 53 plate with 120,000 miles. My car is looking good running good, so I wanted to make my 1994 chev S10 blazer look as good under the hood as it does outside, so I washed my Vortec V6 up, waited under the sun for about 6 hrs.started it up and it started to idel rough so I change dist.cap,wires,plugs, still idels rough. Oddly the colder it is, the less misfires. Mostly at cold starts, i have to throttle it like 6 times, then ignition will work & car starts, but with still low Idle/rpm mode. Lots of high-horsepower motors run worse when cold, so until I get some heat in the car I just stay light on the throttle and keep the rpms above 2,500 to avoid the issue. Posted to Technical Discussion Forum on 2/26/2014 23 Replies. An engine misfire can be temporary or continuous and will sometimes generate a check-engine code. spark plug looks clean, changed coils, clean and changed for check vanos solinoids, nothing change. I believe it produces a lot of carbon because of this. I replaced the following Electronic Coolant Temp Sensor, Crankshaft Position Sensor, Knock Sensor, and cleaned the Throttle Body. Cars often jerk when accelerating, after being left outside in cold, rainy temperatures. ... My build date was November 2009 so outside any recalls. Step 3 - Start the engine cold, quickly take a reading at the front of each cylinder's exhaust port on the manifold while maintaining similar placement of the beam over each individual port, a misfiring cylinder will be considerably colder than the remaining cylinders. 2. My car misfires bad when it is warm outside. The car is filled up with 93 pump gas now and still misfires when the Motor is on the warm up cycle. I had the coilpacks replaced, open recall from Audi, and also the valve cover gasket. My car is idling rough and misfires when it is cold outside when it is warm normal temp she doesn't misfire I also noticed my rmps are higher than usual and I smell gas . Mark Bike misfires when cold. This happens when the car is left outside when its … For an internal combustion engine to work properly there has to be a flammable mixture of fuel vapor (e.g. The symptoms vary by vehicle but are usually described as a stumble or brief hesitation in power delivery. After about 10 minutes of driving, the misfiring went away. Whatever the reason, a short - 5 minute, max - warmup solves the issue for me. You’ll probably see a bunch more posts like yours for the next 4 months. gasoline) and air. With a 12 year old car, several different faults that occur when it rains could be a sign that the whole electrical system is getting old, rather than faults closely related to the symptoms. The car ran fine for a day or so and went back to the rough idle and misfire. If it does misfire during cold weather, then it will in about 12 seconds. ck. When engine is cold, misfires do not happen much, as it warms up it gets very bad. I had a hose come off of the intake of my car and I had to hold the throttle about half way open for cold start or keep the engine running when first started. Ignition misfire. Sudden misfires at cold start around this time of year are usually due to carbon build up on the valves or intake flap motor issues. Inspect the number two ignition coil boot. i have Bmw e60 2008 535i n54. The check engine light comes on and when getting out of the car it gives you a good shock. computer- no code no fouls, cold starts rpm 650, but after 15-20 min rpm 800 and dont move. The misfire isn\'t consistent, sometimes it will be a small blip other times it … problems comes back after days of not starting it up again. Answer: This is a guess, but if the misfires are more noticeable with a cold engine or outside cold temperature, it's possible the fault is in the fuel system (lean condition) or a sensor failing to send the correct data to the computer. This vehicle has a misfire when cold for about 4 minutes then it clears up. E39 (1997 - 2003) Car misfiring when cold/basically everyday. I also replaced the spark plugs as well.
Engine is rthe 3.5 V6. Random misfire on my 1997 GMC Sonoma, 4.3L Vortec engine. When the car has stood still for a couple of days, I can be pretty sure it will misfire. The Google search referred to is regarding parts of the country that have cold ambient winter temps as the Alcohol based fuel hates cold outside temps. Hello All, A few days ago my 2004 Honda Odyssey started running very rough for a few seconds whenever it was cold started. Here are the things I have tried / points of information. Jump to Latest Follow After replacing the intake manifold we haven't had one issue with rough idle in cold weather - completely healed!! This is the result of moisture building up in the distributor cap, which produces an uneven electrical current, and the engine misfires. I also think it's a very rudimentary FI system that probably isn't as advanced as a car's. My car has an automatic transmission. Rattling on cold start. Over the last week my car has been misfiring on cold starts and idling around 1200rpm before settling down. The repair was quite expensive, but it was cheaper than buying another used car - about $1,800 for manifold, coils and a few other items that needed replacing at 185,000 miles. \015 The misfire occurs at 2 minutes after initial cold start and lasts 15 to 20 seconds. The Check Engine light also comes on. I’ve been logging the cold start misfires for the last few days and have noticed a correlation between the outside ambient temperature and how many misfires cylinder 4 gets. Misfires happen at any rpm. While driving, pay close attention to how your engine is running. driving from cold, after short warming by choke, there is not able to idle and usually stall at crossings; at hilly road, no power and misfire (mostly P0304, less often P0303, occasionally P0300, P0301, P0302) warming engine ends above mentioned problems, car runs fine; engine idle is rhytmic pulsating 50rpm up/down, frequency cca 0.5 Hz Engine misfires can be a mysterious, frustrating problem—and information around them often makes them sound worse than they are. please help. That pattern continued for about three days. Leakage of 20% or more would be out of specification. If there is too much fuel and not enough air, the mixture is said to be too rich. All cars have quirks! That continued until I got home. Sure enough yesterday morning … As the engine gets older, it starts to rattle more and more during cold starts, and this is a sign that the timing chain is worn. This is often due to a timing chain attached to the engine. hi. rpm 800. i clean trottle and change too, nothing change. The extra stress of humidity or water spraying around pushes it over the edge from its "just about working OK" state when everything is dry. Leaving a car in a garage before rainy weather helps to … then at operating temp?, idle goes up & seems stable. More when hot outside than cold. thank you. You may want to monitor fuel pressure when the engine starts cold. My engine light immediately came on, and my engine started to misfire. ! and I get spark to the plugs. Cold start misfires & carbon cleaning QV at 6,000 miles? Starting the car at this point is very ok, even when after 5-7 hours, will still fireup/ignite well. 1. Same issue here from day 1 (I have only the stock tune BTW), but not when it's below 20-something degrees F outside. A wave of water came over my hood and windshield. Perform a cylinder leak down test when the engine is cold. and # 4 & 6 dont change the idel. The fact that it only happens at idle and goes away and only when it’s really cold out is almost 100% a sign you need or carbon cleaning. When a misfire occurs, take note of the circumstances such as whether the engine is cold or has warmed up; the speed at which it occurs (low speed or high speed); the frequency it occurs; and if it occurs … However, during cold weather it doesn't misfire at all. New plugs, coils, injectors, cam sensors, oil control valves, O2 sensors all on driver side bank and cat converter. Having looked online it seems that the most probable cause if cold misfires is injector issues at around £200 each. An ignition system problem is one of the most common reasons for an engine to misfire. rpm problems when engine warm. It may be a coincidence, but the problem started when the weather was getting colder (temperatures dropping below 10°C or 50°F). 1989 toyota corolla misfires. As the spark plugs, ignition cables, distributor cap and rotor, and ignition coil wear over time, their ability to transfer the needed spark to ignite the air-fuel mixture inside the combustion chambers becomes compromised. -It goes away after i restart, Its almost like when i first start my car up cold, it will misfire like one piston and i can feel it, and if i brake then more will misfire putting it into limp mode and the ETC light flashes (This post was edited by domthedurango on Nov 30, 2012, 1:27 PM) Coolant temp sensor looks good, from outside temp when cold up to the normal operating range all the way to the fan kicking in Map sensor _appears_ normal, reads 101 kpa/1 bar/14.6psi (am just above sea level) engine off to 33kpa/.33bar/4.79psi at warm idle Timing is correct, have quadruple checked this Mat Sensor reads correctly The next morning when I started the car, the engine light came on and the car misfired. For example, the misfires may not occur at all when I have driven the car the day before. Some modern engines naturally rattle very strongly during a cold start. Once warm it'll start up smooth every time. Hello All . My car has been misfiring randomly at idle and occasionally but not often at operating speed/rpm. When it’s 34F degrees or below, cylinder 4 gets between 0 and 4 misfires on cold … If I leave it parked outside in cold, I don't have the problem. After warm it drove fine. My Renault Scenic misfires - but only when it's cold outside I have a Renault Scenic 1.9dCi on a 53 plate with 120,000 miles. My car is looking good running good, so I wanted to make my 1994 chev S10 blazer look as good under the hood as it does outside, so I washed my Vortec V6 up, waited under the sun for about 6 hrs.started it up and it started to idel rough so I change dist.cap,wires,plugs, still idels rough. Oddly the colder it is, the less misfires. Mostly at cold starts, i have to throttle it like 6 times, then ignition will work & car starts, but with still low Idle/rpm mode. Lots of high-horsepower motors run worse when cold, so until I get some heat in the car I just stay light on the throttle and keep the rpms above 2,500 to avoid the issue. Posted to Technical Discussion Forum on 2/26/2014 23 Replies. An engine misfire can be temporary or continuous and will sometimes generate a check-engine code. spark plug looks clean, changed coils, clean and changed for check vanos solinoids, nothing change. I believe it produces a lot of carbon because of this. I replaced the following Electronic Coolant Temp Sensor, Crankshaft Position Sensor, Knock Sensor, and cleaned the Throttle Body. Cars often jerk when accelerating, after being left outside in cold, rainy temperatures. ... My build date was November 2009 so outside any recalls. Step 3 - Start the engine cold, quickly take a reading at the front of each cylinder's exhaust port on the manifold while maintaining similar placement of the beam over each individual port, a misfiring cylinder will be considerably colder than the remaining cylinders. 2. My car misfires bad when it is warm outside. The car is filled up with 93 pump gas now and still misfires when the Motor is on the warm up cycle. I had the coilpacks replaced, open recall from Audi, and also the valve cover gasket. My car is idling rough and misfires when it is cold outside when it is warm normal temp she doesn't misfire I also noticed my rmps are higher than usual and I smell gas . Mark Bike misfires when cold. This happens when the car is left outside when its … For an internal combustion engine to work properly there has to be a flammable mixture of fuel vapor (e.g. The symptoms vary by vehicle but are usually described as a stumble or brief hesitation in power delivery. After about 10 minutes of driving, the misfiring went away. Whatever the reason, a short - 5 minute, max - warmup solves the issue for me. You’ll probably see a bunch more posts like yours for the next 4 months. gasoline) and air. With a 12 year old car, several different faults that occur when it rains could be a sign that the whole electrical system is getting old, rather than faults closely related to the symptoms. The car ran fine for a day or so and went back to the rough idle and misfire. If it does misfire during cold weather, then it will in about 12 seconds. ck. When engine is cold, misfires do not happen much, as it warms up it gets very bad. I had a hose come off of the intake of my car and I had to hold the throttle about half way open for cold start or keep the engine running when first started. Ignition misfire. Sudden misfires at cold start around this time of year are usually due to carbon build up on the valves or intake flap motor issues. Inspect the number two ignition coil boot. i have Bmw e60 2008 535i n54. The check engine light comes on and when getting out of the car it gives you a good shock. computer- no code no fouls, cold starts rpm 650, but after 15-20 min rpm 800 and dont move. The misfire isn\'t consistent, sometimes it will be a small blip other times it … problems comes back after days of not starting it up again. Answer: This is a guess, but if the misfires are more noticeable with a cold engine or outside cold temperature, it's possible the fault is in the fuel system (lean condition) or a sensor failing to send the correct data to the computer. This vehicle has a misfire when cold for about 4 minutes then it clears up. E39 (1997 - 2003) Car misfiring when cold/basically everyday. I also replaced the spark plugs as well.