Gmc 2 2 Engine Schematics

This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and therefore not compensated for and can lean the engine out and can plus permit the engine to rev up afterward not desired causing coarse running. As its a mechanical deviation it tends not to perspective on the defect well-ventilated and you can sometimes hear a hissing noise similar to the engine running.

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Might plus be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can pull off a quick irregularity find if you unplug the meter and control the engine without it. if the engine condition is the similar after that chances are the meter or the association to it is faulty. Its with worth cleaning the MAF sensor wires, as they can get coated following dirt greater than era which after that offsets the reading. Use some right of entry cleaner or brake cleaner to spray onto the wires to cut off the dirt on no account touch the wires once anything as they are definitely fragile

bearing in mind I start the car, the engine surges occurring in the company of 1200 and 2000 rpm incite and forth. I untouched the IAC and the TPS subsequent to no modify in symptoms. I have noticed that several Lexus SC's have this same issue. Prior to this I would have to get used to the idle keenness screw to belittle the rpm and it would support for a while. Now, the engine is until the end of time surging to the reduction where I cannot drive it for clock radio of broken to the drive train. Any experienced solution?

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