Chevy Hei Ignition Wiring

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 pain that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After frustrating 2-3 substitute 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 up to the dealer.. this get older he says, it needs a ECU. I did a lot of research on them, and found that its a common difficulty with 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 compulsion to be re-adjusted? The master tech did all sorts of diagnostics on all linked parts (tps, maf, iac). $100-200 all times I recognize it do the dealer for diagnostics.. upon going problems are in fact toting up up. I m undecided to lie alongside the tps if he had it dialed. Any insight? Thanks in advance. Jason

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Thanks for your response. I just checked what you mentioned, that I hadn't already checked, except fuel pressure.Let me say you a tiny more about the problem history. It currently has a master tech recognized idle let breathe control valve and tps installed. without upsetting anything, the last (used) ecu and my original, would direct in the car without this symptom.

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

Picture Schematics for chevy hei ignition wiring

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