99 Ford F250 Fuse Box 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 in addition to permit the engine to rev up behind not desired causing uncompromising running. As its a mechanical oddity it tends not to point upon the irregularity vivacious and you can sometimes listen a hissing noise later than the engine running.

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I did re-check them tho. The master tech did extensive tests upon the ventilate flow meter and said it was good. next I unplug it and rule the motor, the car runs uncompromising and at 850ish. I can lonely guess that my additional 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 direct in the substitute of rpm though? I think it single-handedly adjusts it on the subject of 1k..

This could be a large vacuum leak ,with the MAF combined it is deserted measuring the ventilate that is getting later than the MAF, thus if the intake manifold is sucking in air the ventilate to fuel ratio will be utterly out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. afterward carb cleaner vaporizer spray can in the place of the hissing once the engine handing out and taking into consideration you hear the engine stall or rev unconventional there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.

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