2001 Subaru Forester Fuse Box

This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and in view of that not compensated for and can lean the engine out and can after that allow the engine to rev occurring as soon as not desired causing gruff running. As its a mechanical irregularity it tends not to approach on the defect fresh and you can sometimes listen a hissing noise in imitation of 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 tell you a tiny more nearly the burden history. It currently has a master tech approved idle air govern valve and tps installed. without moving anything, the last (used) ecu and my original, would direct in the car without this symptom.

This could be a large vacuum leak ,with the MAF similar it is unaccompanied measuring the freshen that is getting in the same way as the MAF, in view of that if the intake manifold is sucking in let breathe the air 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. subsequently carb cleaner spray spray in the area of the hissing taking into account the engine presidency and subsequently you hear the engine stall or rev vanguard there is the leak ,could be a bad vacuum hose bad gasket on the manifold.

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