Prius Fuse Box Cover

Check the hose clips for tightness and inspect the trunking for any cracks or splits and as well as every the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best pretension to locate a leak is to have the engine running and warm and next vaporizer lighter gas /propane or brake cleaner in this area each joint in turn. If the engine rev s in the works you ve found your leak.

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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 not quite the difficulty history. It currently has a master tech certified idle ventilate direct valve and tps installed. without upsetting 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 combined it is deserted measuring the expose that is getting in imitation of the MAF, hence if the intake manifold is sucking in expose the freshen to fuel ratio will be entirely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. once carb cleaner spray spray in the area of the hissing taking into consideration the engine organization and in the manner of you listen the engine stall or rev later there is the leak ,could be a bad vacuum hose bad gasket on the manifold.

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