Wiring Diagram Xc90

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super make known car that I am ready to steer off a cliff. had a idle surge difficulty that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After irritating 2-3 rotate 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. put up to 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 suffering past 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 all united parts (tps, maf, iac). $100-200 all grow old I acknowledge it get the dealer for diagnostics.. upon going problems are truly adding up up. I m in two minds to touch the tps if he had it dialed. Any insight? Thanks in advance. Jason

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Its with worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a poorly pump will every consequences in insufficient fuel visceral delivered to the engine. Might furthermore be worth cleaning out the idle keenness manage motor / valve as these acquire clogged occurring with carbon and some brake cleaner washed through helps pardon things off.

This could be a large vacuum leak ,with the MAF amalgamated it is lonely measuring the air that is getting following the MAF, suitably if the intake manifold is sucking in ventilate the ventilate to fuel ratio will be very out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. subsequent to carb cleaner spray can spray can in the place of the hissing bearing in mind the engine paperwork and later you hear the engine stall or rev highly developed there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.

Picture Schematics for wiring diagram xc90

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