To: AUDI >The symptoms: It starts instantly. When the rev's are below about >2500, it misses pretty bad. Above 3000 RPM's it seems to run fine. >It misses at idle also. First thing I would check is the spark plug wires. If one is arcing to ground from time to time, the old 5 will run ruff. My 4000 Q exhibited the same symptoms and I finally found it by trial and error. ---JCG.