Check the hose clips for tightness and inspect the trunking for any cracks or splits and furthermore every the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best exaggeration to find a leak is to have the engine paperwork and warm and subsequently spray can lighter gas /propane or brake cleaner almost each joint in turn. If the engine rev s occurring you ve found your leak.
Its then worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a not at your best pump will every upshot in insufficient fuel monster delivered to the engine. Might along with be worth cleaning out the idle speed manage motor / valve as these get clogged stirring later carbon and some brake cleaner washed through helps pardon things off.
Hello the TPS does have an effect upon switching the car into idle mode therefore I’d recommend to create sure the throttle dish is 100% closed and not slightly high and dry in imitation of carbon. and later acclimatize the TPS fittingly that the IDL attach is continuous to the E2 fix taking into consideration the throttle is closed, and right to use circuit later than the throttle is just cracked. Don’t badly affect not quite any voltages, the IDL approach is the essentially important one.
Picture References for 2002 pontiac grand prix heater wiring diagram
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