Hi All
In the past few weeks my car has developed an intemittent fault which I hope some of you may be able to point me in the right direction with.
Sometimes when starting the car from cold, the engine sounds like its running on 3 cylinders and so shakes like mad rattling the exhaust etc in the process, but at the same time its trying to idle at about 12-1300 rpm, higher than usual. When I then pull away its quite irratic at low revs / light throttle and when coming to traffic lights etc it tries to stall on occasions, but if you rev it more it generally picks up OK, and the fault if present clears itself within 5-10 minutes running, and only does it maybe once or twice per week, not every cold start.
Today for the first time it seemed to hesitate when I accelerated coming off a roundabout onto a dual carriageway even though it was warmed up, and again started feeling lumpy and hesistant on a light throttle particularly but I was within 5 minutes of the end of my journey so couldnt check if it continued, but when starting back up to come home it was lumpy again for a few minutes until its warmed up as its done previously.
Ive put VAG COM on it and it mentioned an intermittent signal from the coolant temp sensor, but Im inclined to think that may be a red herring and it may be something like a coil pack actually causing the problems? When they fail do they gradually break down and cause these kind of symptoms, or do they just die immediately? Any other ideas?
thanks
Chris
In the past few weeks my car has developed an intemittent fault which I hope some of you may be able to point me in the right direction with.
Sometimes when starting the car from cold, the engine sounds like its running on 3 cylinders and so shakes like mad rattling the exhaust etc in the process, but at the same time its trying to idle at about 12-1300 rpm, higher than usual. When I then pull away its quite irratic at low revs / light throttle and when coming to traffic lights etc it tries to stall on occasions, but if you rev it more it generally picks up OK, and the fault if present clears itself within 5-10 minutes running, and only does it maybe once or twice per week, not every cold start.
Today for the first time it seemed to hesitate when I accelerated coming off a roundabout onto a dual carriageway even though it was warmed up, and again started feeling lumpy and hesistant on a light throttle particularly but I was within 5 minutes of the end of my journey so couldnt check if it continued, but when starting back up to come home it was lumpy again for a few minutes until its warmed up as its done previously.
Ive put VAG COM on it and it mentioned an intermittent signal from the coolant temp sensor, but Im inclined to think that may be a red herring and it may be something like a coil pack actually causing the problems? When they fail do they gradually break down and cause these kind of symptoms, or do they just die immediately? Any other ideas?
thanks
Chris
