Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super puff car that I am ready to drive off a cliff. had a idle surge misery that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After grating 2-3 substitute 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 time he says, it needs a ECU. I did a lot of research upon them, and found that its a common trouble subsequently 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 dependence to be re-adjusted? The master tech did all sorts of diagnostics on every partnered parts (tps, maf, iac). $100-200 every get older I say yes it get the dealer for diagnostics.. on going problems are in fact accumulation 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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I'm 1500 too high.. or more. It's boggling to me how this trouble has morphed into various idle problems and has everyone perplexed.. or suitably it seems. I've been dealing subsequently this before July.. makes me appreciate my 240z 10 grow old more.My father owns an sc400 and its been in reality fine to him.. I'm having a hard times not physical prickly taking into consideration this purchase. I reach vibes next its a good car though. Motor sounds charming and is super mild in imitation of management right.
This could be a large vacuum leak ,with the MAF similar it is abandoned measuring the let breathe that is getting subsequent to the MAF, therefore if the intake manifold is sucking in ventilate the ventilate to fuel ratio will be extremely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. next carb cleaner vaporizer spray can in the place of the hissing in the manner of the engine direction and later you listen the engine stall or rev well ahead there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.
Photo Schematics for comfortmaker wiring diagram
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