Ac Thermostat Wiring Colors

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super market car that I am ready to drive off a cliff. had a idle surge misery that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After exasperating 2-3 swap 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 to the dealer.. this grow 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 habit to be re-adjusted? The master tech did all sorts of diagnostics upon all connected parts (tps, maf, iac). $100-200 all time I endure it realize the dealer for diagnostics.. upon going problems are in reality adding up. I m in two minds to be next to the tps if he had it dialed. Any insight? Thanks in advance. Jason

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Its also worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a not a hundred percent pump will all outcome in insufficient fuel swine delivered to the engine. Might then be worth cleaning out the idle swiftness control motor / valve as these get clogged occurring behind carbon and some brake cleaner washed through helps forgive things off.

I don't have any check engine lights unless I unplug the MAF sensor. taking into account the MAF is plugged in later the car will stall unless I put my foot upon the accelerator. There is then an intermittent popping sound coming at idle.

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