Automotive Electrical Wiring Diagrams

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super present car that I am ready to steer off a cliff. had a idle surge trouble that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After trying 2-3 exchange 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. nevertheless had issues. put up to to the dealer.. this period he says, it needs a ECU. I did a lot of research on them, and found that its a common hardship once this car.. bought a used one.. more trouble. had the native 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 compulsion to be re-adjusted? The master tech did all sorts of diagnostics upon all joined parts (tps, maf, iac). $100-200 every mature I agree to it attain the dealer for diagnostics.. upon going problems are essentially surcharge up. I m of two minds to lie alongside the tps if he had it dialed. Any insight? Thanks in advance. Jason

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Its plus worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a sick pump will every consequences in insufficient fuel physical delivered to the engine. Might as well as be worth cleaning out the idle enthusiasm rule motor / valve as these get clogged taking place with carbon and some brake cleaner washed through helps release things off.

I don't have any check engine lights unless I unplug the MAF sensor. in imitation of the MAF is plugged in later the car will stall unless I put my foot on the accelerator. There is moreover an intermittent popping strong coming at idle.

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