hanging RPM :(

Hi,



I've got MG TF 135 and a problem with hanging RPM.

Very often after a few minutes of driving RPM hangs on 1200 - 1500. Sometimes hangs on 4000 RPM.

The throttle is metal version and it's OK and clean - don't hangs and it looks like it closes like it should be (I've tested it manualy on parked car).

I've changed sparks, high voltage cables with coils and stepper motor.

I'don't have idea what it should be. Any ideas ?

I'm from Poland and MG is not popular brand here (it never been oficialy imported) and so unfortunately we don't have specialist in garages who knows rover engines and that kind of car. :(

So please help me what should I check now to find a solution ?



Andy

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