Wiring 3 Switches

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super puff car that I am ready to steer off a cliff. had a idle surge burden that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After maddening 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 up to the dealer.. this era he says, it needs a ECU. I did a lot of research upon them, and found that its a common misfortune in the same way as 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 craving to be re-adjusted? The master tech did all sorts of diagnostics upon every partnered parts (tps, maf, iac). $100-200 every epoch I say yes it reach the dealer for diagnostics.. upon going problems are in point of fact adding together 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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I did re-check them tho. The master tech did extensive tests upon the air flow meter and said it was good. in imitation of I unplug it and govern the motor, the car runs rough and at 850ish. I can forlorn guess that my further rebuilt ecu has an issue, or the tps needs to be re-adjusted, or somehow my maf has died in the midst of every this. I don't think the tps has that much manage in the rotate of rpm though? I think it deserted adjusts it something like 1k..

This could be a large vacuum leak ,with the MAF combined it is on your own measuring the freshen that is getting in the same way as the MAF, consequently if the intake manifold is sucking in air the expose to fuel ratio will be enormously out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. past carb cleaner spray can spray can in the place of the hissing in the same way as the engine dispensation and in imitation of you listen the engine stall or rev vanguard there is the leak ,could be a bad vacuum hose bad gasket on the manifold.

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