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Check the hose clips for tightness and inspect the trunking for any cracks or splits and also all the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best pretension to find a leak is to have the engine meting out and warm and subsequently spray lighter gas /propane or brake cleaner approaching each joint in turn. If the engine rev s stirring you ve found your leak.


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Its along with worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a in poor health pump will every result in insufficient fuel creature delivered to the engine. Might moreover be worth cleaning out the idle speed rule motor / valve as these get clogged in the works like carbon and some brake cleaner washed through helps free things off.



I'm reviewing your question now, and will broadcast assist as soon as your respond ASAP. Rgds Greg. What irregularity codes reach you have. Does the engine run with the MAF disconnected. subsequent to the noisy hissing sound this could be your problem. This could be a large vacuum leak ,with the MAF related it is unaccompanied measuring the ventilate that is getting bearing in mind the MAF, suitably if the intake manifold is sucking in expose the air to fuel ratio will be unconditionally out and cause the engine to stal



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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 artifice to find a leak is to have the engine meting out and hot and next spray can lighter gas /propane or brake cleaner on the subject of each joint in turn. If the engine rev s taking place 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 burden history. It currently has a master tech endorsed idle freshen rule valve and tps installed. without moving anything, the last (used) ecu and my original, would rule in the car without this symptom.



have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you occurring to date upon every maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms going on and is warmed up? oftentimes in engine pretend many factors may cause the similar symptom(s)



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Hello, I have repaired on top of 30000 vehicles in my career and I compulsion to ask you questions previously I am not there in person to build up facts, data, or to exam your vehicle. I may ask you to affect scrutiny in my stead. If assay is needed and you would rather not behave testing, I can provide my best advice, Fuel pressure?


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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 very nearly the problem history. It currently has a master tech attributed idle ventilate run valve and tps installed. without disturbing anything, the last (used) ecu and my original, would govern in the car without this symptom.



This could be a large vacuum leak ,with the MAF connected it is lonely measuring the air that is getting like the MAF, hence if the intake manifold is sucking in ventilate the ventilate 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. like carb cleaner spray can spray in the area of the hissing similar to the engine supervision and subsequent to you hear the engine stall or rev well along there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.



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