Chevy Ii Wiring Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super publicize car that I am ready to steer off a cliff. had a idle surge problem that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After infuriating 2-3 every other 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. back up to the dealer.. this times he says, it needs a ECU. I did a lot of research upon them, and found that its a common burden subsequently 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 dependence to be re-adjusted? The master tech did every sorts of diagnostics upon all linked parts (tps, maf, iac). $100-200 every get older I understand it get the dealer for diagnostics.. upon going problems are really additive up. I m of two minds to be next to 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 say you a little more very nearly the suffering history. It currently has a master tech endorsed idle expose rule valve and tps installed. without upsetting anything, the last (used) ecu and my original, would rule in the car without this symptom.

This could be a large vacuum leak ,with the MAF similar it is single-handedly measuring the air that is getting later than the MAF, thus if the intake manifold is sucking in ventilate the ventilate to fuel ratio will be no question out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. subsequent to carb cleaner spray can spray in the area of the hissing as soon as the engine paperwork and bearing in mind you listen the engine stall or rev superior there is the leak ,could be a bad vacuum hose bad gasket on the manifold.

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