I purchased a 1988 Golf Cabriolet for $500, pics soon, and it has a few problems. It is a European model, which makes sense as I am in Germany. The roof needs to be replaced, and there is an interesting problem with the engine. There is blowback as there is oil on the air filter, the engine leaks oil pretty well but I was told redoing the seal would increase said blowback. Also, the idle is all FUBAR. In the morning, when it is quite cold, it runs ragged as hell, I have to rev the engine to keep it from stalling out. Later in the day, after it has warmed up, it can rev high, from 2000-2500 RPMs. Anyways, I was wondering if anyone could tell me what to do about the blow back so I can reseal the engine and stop the oil leak. That, or the revving issue would be great to have help with.