87 F250 Wiring Diagram

This could be an airleak after the airflow meter, any freshen dragged in here isn t seen by the ECU and so not compensated for and can thin the engine out and can next allow the engine to rev going on next not desired causing rasping running. As its a mechanical fault it tends not to slant on the malfunction lively and you can sometimes listen a hissing noise with the engine running.

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Might next be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can attain a quick idiosyncrasy find if you unplug the meter and control the engine without it. if the engine condition is the same later chances are the meter or the connection to it is faulty. Its in addition to worth cleaning the MAF sensor wires, as they can get coated when dirt on top of epoch which later offsets the reading. Use some contact cleaner or brake cleaner to vaporizer onto the wires to surgically remove the dirt upon no account be adjacent to the wires in imitation of whatever as they are agreed fragile

later I begin the car, the engine surges occurring in the middle of 1200 and 2000 rpm support and forth. I misused the IAC and the TPS when no change 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 eagerness screw to humiliate the rpm and it would maintain for a while. Now, the engine is all the time surging to the point where I cannot steer it for unease of broken to the drive train. Any experienced solution?

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