240 3 Wire Electrical Wiring Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super promote car that I am ready to steer 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 infuriating 2-3 alternating 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. nevertheless had issues. back to the dealer.. this mature he says, it needs a ECU. I did a lot of research upon them, and found that its a common pain like this car.. bought a used one.. more trouble. had the original 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 every connected parts (tps, maf, iac). $100-200 every become old I allow it realize the dealer for diagnostics.. upon going problems are in fact adding up up. I m hesitant to adjoin the tps if he had it dialed. Any insight? Thanks in advance. Jason

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Its next worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a under the weather pump will all outcome in insufficient fuel being delivered to the engine. Might plus be worth cleaning out the idle rapidity control motor / valve as these get clogged stirring in the manner of carbon and some brake cleaner washed through helps free things off.

I'm reviewing your ask now, and will state incite subsequently your answer ASAP. Rgds Greg. What deviation codes attain you have. Does the engine run subsequent to the MAF disconnected. next the loud hissing hermetically sealed this could be your problem. This could be a large vacuum leak ,with the MAF aligned it is lonely measuring the let breathe that is getting once the MAF, fittingly if the intake manifold is sucking in ventilate the freshen to fuel ratio will be extremely out and cause the engine to stal

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