Wiring Harness Early Bronco

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super promote car that I am ready to drive off a cliff. had a idle surge problem that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After aggravating 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. yet had issues. assist 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 burden considering 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 compulsion to be re-adjusted? The master tech did every sorts of diagnostics upon every combined parts (tps, maf, iac). $100-200 all times I undertake it realize the dealer for diagnostics.. upon going problems are in fact tallying up. I m unsure to be next to 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 tell you a little more roughly the hardship history. It currently has a master tech credited idle let breathe control valve and tps installed. without touching anything, the last (used) ecu and my original, would rule in the car without this symptom.

This could be a large vacuum leak ,with the MAF partnered it is unaided measuring the expose that is getting in the manner of the MAF, consequently if the intake manifold is sucking in expose the let breathe to fuel ratio will be unquestionably out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. next carb cleaner spray spray in the place of the hissing when the engine supervision and next you hear the engine stall or rev far ahead there is the leak ,could be a bad vacuum hose bad gasket on the manifold.

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