89 F150 Tach Wiring Diagram

This could be an airleak after the airflow meter, any air dragged in here isn t seen by the ECU and so not compensated for and can thin the engine out and can next permit the engine to rev taking place taking into account not desired causing coarse running. As its a mechanical deformity it tends not to twist upon the oddity well-ventilated and you can sometimes listen a hissing noise like the engine running.

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Thanks for your response. I just checked what you mentioned, that I hadn't already checked, except fuel pressure.Let me say you a little more roughly the pain history. It currently has a master tech qualified idle let breathe govern valve and tps installed. without upsetting anything, the last (used) ecu and my original, would govern in the car without this symptom.

I don't have any check engine lights unless I unplug the MAF sensor. later than the MAF is plugged in subsequently the car will stall unless I put my foot on the accelerator. There is afterward an intermittent popping solid coming at idle.

Photo Schematics for 89 f150 tach wiring diagram

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