Chevy Steering Column Wiring Diagram For 1972

This could be an airleak after the airflow meter, any freshen dragged in here isn t seen by the ECU and hence not compensated for and can lean the engine out and can with permit the engine to rev happening when not desired causing rude running. As its a mechanical anomaly it tends not to perspective on the malfunction fresh and you can sometimes hear a hissing noise subsequently the engine running.

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I did re-check them tho. The master tech did extensive tests on the freshen flow meter and said it was good. behind I unplug it and control the motor, the car runs rough and at 850ish. I can isolated guess that my extra 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 rule in the different of rpm though? I think it single-handedly adjusts it all but 1k..

This could be a large vacuum leak ,with the MAF linked it is only measuring the ventilate that is getting subsequently the MAF, appropriately if the intake manifold is sucking in expose the let breathe to fuel ratio will be totally out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. as soon as carb cleaner spray can vaporizer in the area of the hissing similar to the engine direction and when you listen the engine stall or rev far along there is the leak ,could be a bad vacuum hose bad gasket on the manifold.

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