2004 Pontiac Montana Engine Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super broadcast car that I am ready to steer off a cliff. had a idle surge misfortune that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After frustrating 2-3 swing used IAC s, I took it to the master tech at lexus. He said it was the IAC valve. He tried my used ones.. and finally a rebuilt one. still had issues. incite to the dealer.. this become old he says, it needs a ECU. I did a lot of research upon them, and found that its a common suffering taking into account this car.. bought a used one.. more trouble. had the indigenous one rebuilt by a specialist.. and that s where I am at now.. Put it in tonight and the car idles at 2k rpm. Does the TPS craving to be re-adjusted? The master tech did every sorts of diagnostics on every related parts (tps, maf, iac). $100-200 every era I tolerate it reach the dealer for diagnostics.. upon going problems are essentially appendage up. I m hesitant to adjoin the tps if he had it dialed. Any insight? Thanks in advance. Jason

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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 little more more or less the pain history. It currently has a master tech certified idle air rule valve and tps installed. without touching anything, the last (used) ecu and my original, would rule in the car without this symptom.

Hello the TPS does have an effect on switching the car into idle mode in view of that I'd suggest to create distinct the throttle dish is 100% closed and not slightly high and dry as soon as carbon. and subsequently adjust the TPS so that the IDL glue is continuous to the E2 stick subsequently the throttle is closed, and admission circuit subsequent to the throttle is just cracked. Don't bother just about any voltages, the IDL admission is the essentially important one.

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