Hello all, this is my first topic here, and despite learning a lot from all of you, I can't get my lovely 1992 205 GTI to run properly.
It seems to run well below around 3500 rpm. It pulls strong, hot or cold, idles hot or cold, and starts consistently.
However, when I pass 3500 rpm, it flutters and the tach drops a bit. This happens hot or cold, and at part or full throttle. As the tachometer drops a when it flutters it seems the car is misfiring. I've already changed out the ignition amplifier (a proper blue Bosch one) and mounted it properly. The coil, distributor cap, dizzy, ignition wires, and spark plugs are replaced. I've also tested it with a different ECU (same part nr) and that gave the same result. As far as I know, those are all the parts in the ignition. As the problem is rev-dependent and the car drives well below 3500, I figure the wiring harness is okay.
So my question is to you, what could be the problem?