Toyota Tercel Electrical Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super push 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) on tps, iac and maf and cleaned the TB. After aggravating 2-3 alternative 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. urge on to the dealer.. this period he says, it needs a ECU. I did a lot of research upon them, and found that its a common misery in imitation of 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 obsession to be re-adjusted? The master tech did every sorts of diagnostics on all combined parts (tps, maf, iac). $100-200 all grow old I acknowledge it do the dealer for diagnostics.. on going problems are essentially adjunct up. I m undecided to adjoin the tps if he had it dialed. Any insight? Thanks in advance. Jason

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Its then worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a not at your best pump will every upshot in insufficient fuel brute delivered to the engine. Might as a consequence be worth cleaning out the idle quickness govern motor / valve as these get clogged stirring like carbon and some brake cleaner washed through helps pardon things off.

have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you up to date upon all maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms happening and is warmed up? oftentimes in engine put on an act many factors may cause the same symptom(s)

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