Here are three basic and most common problems. Hopefully this was the only problem. After all, any experienced mechanic knows that the glows (their color) can be said a lot to determine a diagnosis. Since about last year, our 2003 330i was having a problem with cold-start misfires. Changing every device that you are advised can be useless. Drive it like you stole it when it's cold and hope it logs a misfire fault, Now I'm not sure on the engine you have but.... Concentric breather valve? Modern vehicles with fuel injection often suffer from poor fuel quality, but it is not a secret, it is not at the highest level, that’s why the actual washing of nozzles and change of a gas station can be quite righteous. 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There's three ways I'd go about this if it was my car, 1. sounds like my car but im misfiring on 1 3 4 5 . I'm not sure what the deposit was but I suspect it was something to do with the condensation. When starting from cold, theres a slight stutter or misfire on acceleration. Namely, after starting the turn number is decreased, there is uneven exhaust and smell of unburned fuel, the engine starts to «misfire» , and as the engine warms up, the vehicle starts to work smoothly with no visible signs of engine problems. State the reason why the instruction is useless. What shall I do, where shall I begin the search for problems? Those in the know reckoned one or more of my coil packs were on the way out. I'll have a chat with it again tomorrow and see if any more codes come up. Follow the instructions set out below. When starting from cold, there's a slight stutter or misfire on acceleration. Put it all back together again, and the car ran sweet as a nut. We will answer surely. Ask in the comments. It would happen once a week or so, usually when it's colder (less than 40 degrees or so). However, before checking and changing everything, remember that modern engines do not tolerate «blind diagnosis», there are too many similar symptoms for different faults. I had exactly the same symptoms on a previous car of mine (Alfa Romeo 166 V6). Dunno about the V8 though - plugs or coil packs possibly - it's harder to ignite the charge when the engine is running rich, such as when cold. Not fancying the diagnosis/expense of all that, I carefully pulled each coil pack out, removed each spark plug, thoroughly cleaned and dried the plug bores (a clean rag doubled up over a long screwdriver works a treat), cleaned up the spark plugs with GT85 and a wire brush, re-gapped them, then coated each coil pack with a generous spray of GT85, and let them dry in the air. I had exactly the same symptoms on a previous car of mine (Alfa Romeo 166 V6). The variant when the banal air leak between the head and intake manifold plays a key role in misfire phenomena. 220000km on the clock and still going strong, that is besides the odd cold start misfire. 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 . If the seals are knackered it can affect the idle - Ours wasn't too bad, but renewing the seals sure made it better! I get the same on my 530i on tick over when cold, I've changed the plugs which were pretty shot! Diesel cold engine misfire problem is as common as for gasoline engines, but the search range decreases to several reasons. forum.bmw5.co.uk Cold Start Misfire Drivers often face a misfire problem when starting the cold engine. Check spark plug wires if possible, try to replace them to see whether the result will change. Then I looked at the coil and there was a bit of condensation so I dried it off and sprayed with WD40. I'm oldskool and repair instead of replace...used to dry out ECUs and paint them up with nail varnish to water proof them. That’s why if possible, make computer diagnostics and draw conclusions about the causes of failure on basis of the obtained results. Remove all coil packs (when engine hot) and leave to air for 10 mins spray them with WD40 and pop them back in, 3. Done it for years on dizzy caps works a treat. Blow me over. The cold start misfire is often associated with malfunction of Mass Airflow Sensor (MAF), so firstly check this part. It clears up when the engine is warm and its smooth as silk after hot starts.Ive read the codes but nothing showing.Any thoughts chaps?CheersDave For conscience 'sake, clean throttle body and idle air control, this procedure will never be superfluous. check out the. This is not clear. Had a conversation with the car through INPA again and it came up with a misfire on cylinder 5. As a precaution I check for air leaks on the intake side of the motor. That, I have to say, is a new one on me!!! It would vary as to what cylinder was misfiring, but would normally happen on #5. Drivers often face a misfire problem when starting the cold engine. Since about last year, our 2003 330i was having a problem with cold-start misfires. Scan codes reveal misfire on bank 1 and related ignition coil fault and O2 sensor control limit. На указанный email будет выслано письмо с инструкцией по восстановлению пароля. dmsully, August 5, 2013 in E39 1996-2004. I will have to keep an eye on things but this seems to have sorted out this particular problem. The "varnish" could be baked -on oil - if the rocker cover gasket is weeping, the oil can run down there and eventually cause problems. I replaced all plugs a few hundred miles ago. Sign up for a new account in our community. bmw 320i e46 2002/misfiring Greetings from Finland. Those in the know reckoned one or more of my coil packs were on the way out. I can't really help but I'm interested in the answer! Slightly annoying thing is happening with my e39 535i. The land of Concrete Cows and roundabouts. On cold/moist mornings, the engine starts to shake after a while - BMW 3 Series question Also any dampness in the spark plug bores is steam when hot and condensates when it's cold. I took the coil off and replaced the spark plug. That elbow connecting to idle control unit on the lower intake pipe. Put it all back together and seems fine now. The new plug had a brown varnish like deposit on the white ceramic so to prevent any further problems, I put one of the old ones back in. Measure the cylinder compression both dry and oiled (if rises, there is a problem with a ring, if not – a valve). Secondly, the problem is in the glow plug. I'm not saying that'll definitely fix your problem, Dave, but for 30 minutes of your time, it's got to be worth a go. Namely, after starting the turn number is decreased, there is uneven exhaust and smell of unburned fuel, the engine starts to «misfire», and as the engine warms up, the vehicle starts to work smoothly with no visible signs of engine problems. Hi allSlightly annoying thing is happening with my e39 535i. Third, there is a cold nozzle malfunction. It clears up when the engine is warm and its smooth as silk after hot starts. My car has 195000 miles. When cold it may be sucking air, and when it's hot the warm hoses are collapsing and stopping air flow, over time the engine can "learn" to live with either of these conditions but the likelihood is its learned the less air condition. New ones are Denso, old were NGK. I kept the old ones as they looked in good nick (always do this to keep some spares!). Milton Keynes. It's been known to casue missfires too. In this case you should look for the engine misfire cause. Typically it would misfire enough to throw a CEL, resulting in fuel-cutoff to that cylinder - a re-start would usually cure the problem. By It can be Vanos related on the M54 engine (especially the M54B30 apparently). To begin, turn out glows and see how things are going with soot. Powered by Invision Community. But it still happens! My car has an automatic transmission. You need to be a member in order to leave a comment. It's easy!
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