2003 Isuzu Npr Fuse Box Diagram

Check the hose clips for tightness and inspect the trunking for any cracks or splits and moreover every the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best pretension to locate a leak is to have the engine handing out and warm and next spray can lighter gas /propane or brake cleaner approximately each joint in turn. If the engine rev s going on you ve found your leak.

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I did re-check them tho. The master tech did extensive tests on the let breathe flow meter and said it was good. bearing in mind I unplug it and rule the motor, the car runs rude and at 850ish. I can solitary guess that my further rebuilt ecu has an issue, or the tps needs to be re-adjusted, or somehow my maf has died in the midst of all this. I don't think the tps has that much govern in the every second of rpm though? I think it lonely adjusts it with reference to 1k..

I'm reviewing your question now, and will read out put up to behind your answer ASAP. Rgds Greg. What deviation codes realize you have. Does the engine manage once the MAF disconnected. subsequently the loud hissing sound this could be your problem. This could be a large vacuum leak ,with the MAF amalgamated it is isolated measuring the let breathe that is getting considering the MAF, as a result if the intake manifold is sucking in air the let breathe to fuel ratio will be utterly out and cause the engine to stal

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