As some of you may already know my S3 has been misfiring lately. I changed the coil packs and spark plugs (common problems), it stopped miss firing but then came back. This didn't solve the problem.
Took it into a mechanic today they stuck the vag com in and found the faults that we already know about e.g. misfiring cylinders disconnected MAF disconnected injectors etc etc so they just reseted it.
We checked the spark plugs again, it looked like 1 and 4 had never been used where as 2 and 3 were a bit black as in it had been sparking.
They then went on to doing a compression test in the cylinders where the spark plugs live and found that all 4 were very low on compression.
I have been advised to leave it there and they will perform some other checks, which is to check the timing belt which may be causing to run like how it is if that doesn't work then a compression leakage check.
They told me the worst possible scenario might be that they may need to take the head off to discover faulty valves or a knackard cylinder head which may repairing or replacing.
Could it be possible that valves 1 and 4 are gone thats why spark plugs 1 and 4 still look new?
Hopefully its just a timing issue if not then maybe a valve or two has gone, if it needs a new cylinder head it can be very costly i am not looking forward to it if it is.
Looks like i wont be able to up to gti international tomorrow but ill still going ill just jump in with one of my mates.
I'll update you guys soon hopefully with some good news.
Tek
Took it into a mechanic today they stuck the vag com in and found the faults that we already know about e.g. misfiring cylinders disconnected MAF disconnected injectors etc etc so they just reseted it.
We checked the spark plugs again, it looked like 1 and 4 had never been used where as 2 and 3 were a bit black as in it had been sparking.
They then went on to doing a compression test in the cylinders where the spark plugs live and found that all 4 were very low on compression.
I have been advised to leave it there and they will perform some other checks, which is to check the timing belt which may be causing to run like how it is if that doesn't work then a compression leakage check.
They told me the worst possible scenario might be that they may need to take the head off to discover faulty valves or a knackard cylinder head which may repairing or replacing.
Could it be possible that valves 1 and 4 are gone thats why spark plugs 1 and 4 still look new?Hopefully its just a timing issue if not then maybe a valve or two has gone, if it needs a new cylinder head it can be very costly i am not looking forward to it if it is.
Looks like i wont be able to up to gti international tomorrow but ill still going ill just jump in with one of my mates.
I'll update you guys soon hopefully with some good news.
Tek
