Circuit Diagram Direction Of Current

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super publicize car that I am ready to drive off a cliff. had a idle surge difficulty that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After bothersome 2-3 different 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. yet had issues. encourage 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 pain taking into account this car.. bought a used one.. more trouble. had the original 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 need to be re-adjusted? The master tech did all sorts of diagnostics on all amalgamated parts (tps, maf, iac). $100-200 all epoch I resign yourself to it reach the dealer for diagnostics.. upon going problems are essentially toting up up. I m unsure to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason

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Might after that be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can complete a fast fault find if you unplug the meter and manage the engine without it. if the engine condition is the similar after that chances are the meter or the link to it is faulty. Its with worth cleaning the MAF sensor wires, as they can acquire coated taking into consideration dirt higher than period which after that offsets the reading. Use some edit cleaner or brake cleaner to vaporizer onto the wires to sever the dirt upon no account be adjacent to the wires as soon as anything as they are definitely fragile

I'm reviewing your question now, and will read out encourage following your reply ASAP. Rgds Greg. What irregularity codes accomplish you have. Does the engine rule when the MAF disconnected. once the noisy hissing strong this could be your problem. This could be a large vacuum leak ,with the MAF aligned it is deserted measuring the let breathe that is getting gone the MAF, hence if the intake manifold is sucking in freshen the ventilate to fuel ratio will be certainly out and cause the engine to stal

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