700r4 Transmission Wiring Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super push car that I am ready to drive off a cliff. had a idle surge suffering that I researched online and did tests (per the manual) upon 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 behind 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 infatuation to be re-adjusted? The master tech did every sorts of diagnostics on all related parts (tps, maf, iac). $100-200 every grow old I understand it complete the dealer for diagnostics.. upon going problems are really add-on up. I m hesitant to touch the tps if he had it dialed. Any insight? Thanks in advance. Jason

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Might furthermore be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can realize a quick fault find if you unplug the meter and rule the engine without it. if the engine condition is the same subsequently chances are the meter or the membership to it is faulty. Its with worth cleaning the MAF sensor wires, as they can get coated considering dirt more than become old which then offsets the reading. Use some entry cleaner or brake cleaner to spray onto the wires to cut off the dirt upon no account be adjacent to the wires once all as they are totally fragile

This could be a large vacuum leak ,with the MAF aligned it is lonesome measuring the air that is getting in the manner of the MAF, suitably if the intake manifold is sucking in air the expose to fuel ratio will be certainly out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. in the manner of carb cleaner spray spray can in the place of the hissing bearing in mind the engine government and gone you hear the engine stall or rev well ahead there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.

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