Ford Sierra Wiring Diagram

This could be an airleak after the airflow meter, any freshen dragged in here isn t seen by the ECU and consequently not compensated for and can thin the engine out and can after that permit the engine to rev in the works taking into account not desired causing uncompromising running. As its a mechanical irregularity it tends not to viewpoint on the defect vivacious and you can sometimes listen a hissing noise like the engine running.


I did re-check them tho. The master tech did extensive tests on the ventilate flow meter and said it was good. as soon as I unplug it and control the motor, the car runs rasping and at 850ish. I can unaccompanied guess that my supplementary rebuilt ecu has an issue, or the tps needs to be re-adjusted, or someway my maf has died in the midst of all this. I don't think the tps has that much govern in the swap of rpm though? I think it deserted adjusts it on 1k..

later than I start the car, the engine surges taking place between 1200 and 2000 rpm put up to and forth. I untouched the IAC and the TPS subsequent to no correct in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to get used to the idle promptness screw to belittle the rpm and it would keep for a while. Now, the engine is at all times surging to the point where I cannot steer it for warning of damage to the steer train. Any experienced solution?

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