Pnp Wiring Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super publicize car that I am ready to drive off a cliff. had a idle surge burden that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After grating 2-3 stand-in 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 era he says, it needs a ECU. I did a lot of research upon them, and found that its a common misfortune in the same way as 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 need to be re-adjusted? The master tech did all sorts of diagnostics upon all associated parts (tps, maf, iac). $100-200 all period I say yes it pull off the dealer for diagnostics.. on going problems are essentially adding up up. I m undecided to be next to 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 under the weather pump will all upshot in insufficient fuel physical delivered to the engine. Might also be worth cleaning out the idle swiftness direct motor / valve as these acquire clogged taking place in the same way as carbon and some brake cleaner washed through helps forgive things off.

This could be a large vacuum leak ,with the MAF combined it is only measuring the air that is getting afterward the MAF, for that reason if the intake manifold is sucking in air the freshen to fuel ratio will be categorically out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. like carb cleaner spray spray can in the place of the hissing behind the engine doling out and behind you hear the engine stall or rev well along there is the leak ,could be a bad vacuum hose bad gasket on the manifold.

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