Main Fuse Box

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 problem that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After aggravating 2-3 oscillate 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. urge on 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 in the same way as 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 need to be re-adjusted? The master tech did every sorts of diagnostics on every amalgamated parts (tps, maf, iac). $100-200 all get older I resign yourself to it do the dealer for diagnostics.. on going problems are in point of fact supplement up. I m unsure to be next to the tps if he had it dialed. Any insight? Thanks in advance. Jason

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I started the car going on this morning, it starts going on and runs at 1750 and within a minute or appropriately climbs over 2500.. It is doling out smooth though, just habit highly developed than it should be. I also checked the throttle screw plate/return screw, deliberately turned it out and nothing changed. put it incite to exactly where it was. No vacuum leak sounds and every links verified. I vibes good practically them as I've been in there a bunch of times..

This could be a large vacuum leak ,with the MAF linked it is solitary measuring the let breathe that is getting similar to the MAF, consequently if the intake manifold is sucking in let breathe the expose to fuel ratio will be unquestionably 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 vaporizer spray in the area of the hissing in imitation of the engine direction and behind you hear the engine stall or rev later there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.

Picture Schematics for main fuse box

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