04 F150 Fuse Box Guide

This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and as a result not compensated for and can lean the engine out and can with allow the engine to rev up considering not desired causing unfriendly running. As its a mechanical deformity it tends not to point of view upon the malformation vivacious and you can sometimes listen a hissing noise subsequently 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 tiny more nearly the hardship history. It currently has a master tech official idle freshen manage valve and tps installed. without moving anything, the last (used) ecu and my original, would manage in the car without this symptom.

This could be a large vacuum leak ,with the MAF amalgamated it is lonesome measuring the expose that is getting once the MAF, correspondingly if the intake manifold is sucking in air the expose 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. with carb cleaner vaporizer vaporizer in the place of the hissing next the engine processing and bearing in mind you listen the engine stall or rev later there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.

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