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The problem comes only when I floor and boost goes over 1 bar. I changed the spark plug wires and it went better but still not going right. When I floor it then engine hesitates - goes like it should for few seconds and then doesn't and so on. I think it is ignition related. No boost leak, fuel pressure was OK. Before changing the spark plug wires there was a misfire in one cylinder. Could it have ruined something else?
The problem comes only when I floor and boost goes over 1 bar. I changed the spark plug wires and it went better but still not going right. When I floor it then engine hesitates - goes like it should for few seconds and then doesn't and so on. I think it is ignition related. No boost leak, fuel pressure was OK. Before changing the spark plug wires there was a misfire in one cylinder. Could it have ruined something else?
Reimo
Reimo, if you have an ABY, then it could be a coil pack breaking down. Mine was doing the same so I replaced 3 of the 5 worst, then in typical German engineering fashion, I had to replace the other two last week. All five failed within 4 weeks of each other Not bad after 12 years is it?
Try testing them and see how you go
HTH
Cheers
Karl
Oz
Oct 93 build MY 94 ABY Kingfisher Blue Audi S2 with MD147 turbo :mischeif:u SOLD
Audi 90 Quattro 20V 1989 7A
Audi TTRS 2010 APR stage 2 +
Triumph 675 Street Triple R
FINALLY I solved the problem. It took me ages to have the car running properly. First I changed both knock sensors, then one spark plug and plug wire (was misfiring), then a thermostat and temp. sensor (they were all faulty). Yesterday I bought all new spark plug wires and the difference was noticeable but still there were some spluttering when flooring. Today I went to dealers and bought all new spark plugs. Guess what, a miracle happened - the car is running better then ever (to be honest I didn't remember how quick it was because last time it run well more then half a year ago). To be honest I didn't think that spark plugs can cause such a big problem.
I think I still have to learn this rule - Check the simplest things first and if they are working fine then go further.
Anyway thanks for info and as I saw from your posts then you also noted that the problem was related to spark issue.
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Not bad after 12 years is it?
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