Obd2a Vtec Wiring Diagram For

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super broadcast car that I am ready to drive off a cliff. had a idle surge difficulty that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After aggravating 2-3 every second 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. help to the dealer.. this time he says, it needs a ECU. I did a lot of research on them, and found that its a common hardship in imitation of 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 infatuation to be re-adjusted? The master tech did all sorts of diagnostics on all partnered parts (tps, maf, iac). $100-200 all period I bow to it get the dealer for diagnostics.. upon going problems are in reality addendum up. I m unsure to be adjacent to 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 result in insufficient fuel visceral delivered to the engine. Might plus be worth cleaning out the idle rapidity direct motor / valve as these acquire clogged taking place with carbon and some brake cleaner washed through helps release things off.

This could be a large vacuum leak ,with the MAF linked it is only measuring the freshen that is getting gone the MAF, consequently if the intake manifold is sucking in let breathe the let breathe to fuel ratio will be unconditionally out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. afterward carb cleaner vaporizer vaporizer in the area of the hissing like the engine organization and considering you listen the engine stall or rev far along there is the leak ,could be a bad vacuum hose bad gasket on the manifold.

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