D16y8 Engine Diagram

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 suffering that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After irritating 2-3 oscillate 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. incite 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 misfortune behind 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 craving to be re-adjusted? The master tech did all sorts of diagnostics on every similar parts (tps, maf, iac). $100-200 every grow old I admit it attain the dealer for diagnostics.. on going problems are really appendage up. I m hesitant 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 freshen flow meter and said it was good. taking into consideration I unplug it and run the motor, the car runs severe and at 850ish. I can lonely guess that my supplementary rebuilt ecu has an issue, or the tps needs to be re-adjusted, or anyhow my maf has died in the midst of every this. I don't think the tps has that much govern in the alternative of rpm though? I think it abandoned adjusts it regarding 1k..

I don't have any check engine lights unless I unplug the MAF sensor. past the MAF is plugged in next the car will stall unless I put my foot upon the accelerator. There is furthermore an intermittent popping strong coming at idle.

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