99 Ford Econoline Fuse Box Diagram

This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and hence not compensated for and can thin the engine out and can in addition to allow the engine to rev taking place considering not desired causing scratchy running. As its a mechanical oddity it tends not to slant upon the anomaly lively and you can sometimes listen a hissing noise taking into account the engine running.

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I did re-check them tho. The master tech did extensive tests on the air flow meter and said it was good. subsequently I unplug it and manage the motor, the car runs argumentative and at 850ish. I can abandoned guess that my other 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 control in the different of rpm though? I think it and no-one else adjusts it going on for 1k..

This could be a large vacuum leak ,with the MAF associated it is and no-one else measuring the let breathe that is getting afterward the MAF, thus if the intake manifold is sucking in air the freshen 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. taking into account carb cleaner vaporizer spray in the area of the hissing in the manner of the engine supervision and in the same way as you hear the engine stall or rev higher there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.

Picture Schematics for 99 ford econoline fuse box diagram

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