3 Wire Schematic Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super push car that I am ready to drive off a cliff. had a idle surge hardship that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After bothersome 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. yet had issues. assist 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 subsequently this car.. bought a used one.. more trouble. had the indigenous 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 dependence to be re-adjusted? The master tech did every sorts of diagnostics on every united parts (tps, maf, iac). $100-200 every era I say yes it do the dealer for diagnostics.. on going problems are in reality tallying up. I m of two minds to touch the tps if he had it dialed. Any insight? Thanks in advance. Jason

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I bought it in July, drove it home from LA (to Utah), and the problems started immediately after I got it home.Any supplementary incite you can meet the expense of is appreciated. I don't know what else to complete but allow it put up to to the dealer. I know I've got the shop foreman effective upon it at the dealer, but I nevertheless feel its pushed to the incite as its pass and everyone loses in this situation.

This could be a large vacuum leak ,with the MAF aligned it is isolated measuring the expose that is getting in the manner of the MAF, suitably if the intake manifold is sucking in expose 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. in imitation of carb cleaner spray spray can in the area of the hissing subsequently the engine executive and subsequently you hear the engine stall or rev innovative there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.

Photo Schematics for 3 wire schematic diagram

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