4 Terminal Relay Wiring Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super make public car that I am ready to steer off a cliff. had a idle surge trouble that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After exasperating 2-3 stand-in 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. back to the dealer.. this get older he says, it needs a ECU. I did a lot of research upon them, and found that its a common misery subsequently 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 need to be re-adjusted? The master tech did every sorts of diagnostics upon all aligned parts (tps, maf, iac). $100-200 every get older I agree to it reach the dealer for diagnostics.. on going problems are in fact extra up. I m undecided to touch 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 let breathe flow meter and said it was good. with I unplug it and direct the motor, the car runs scratchy and at 850ish. I can unaided guess that my further rebuilt ecu has an issue, or the tps needs to be re-adjusted, or anyhow my maf has died in the midst of all this. I don't think the tps has that much run in the interchange of rpm though? I think it without help adjusts it concerning 1k..

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

Picture Schematics for 4 terminal relay wiring diagram

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