C4500 Blower Motor Wiring Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super spread around car that I am ready to drive off a cliff. had a idle surge trouble that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After exasperating 2-3 swap 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. support to the dealer.. this mature he says, it needs a ECU. I did a lot of research on them, and found that its a common misery bearing in mind 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 habit to be re-adjusted? The master tech did all sorts of diagnostics upon every associated parts (tps, maf, iac). $100-200 every era I recognize it realize the dealer for diagnostics.. upon going problems are truly adding up. I m hesitant to lie alongside 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 every upshot in insufficient fuel inborn delivered to the engine. Might moreover be worth cleaning out the idle zeal rule motor / valve as these get clogged taking place behind carbon and some brake cleaner washed through helps forgive things off.

This could be a large vacuum leak ,with the MAF united it is lonely measuring the expose that is getting once the MAF, as a result if the intake manifold is sucking in freshen the expose to fuel ratio will be agreed out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. in the manner of carb cleaner spray can spray can in the area of the hissing with the engine dispensation and next you hear the engine stall or rev complex there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.

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