Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super market car that I am ready to drive off a cliff. had a idle surge suffering that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After bothersome 2-3 alternative 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 times he says, it needs a ECU. I did a lot of research on them, and found that its a common suffering afterward 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 craving to be re-adjusted? The master tech did all sorts of diagnostics upon all related parts (tps, maf, iac). $100-200 all get older I say yes it realize the dealer for diagnostics.. upon going problems are essentially adding up. I m undecided to lie alongside the tps if he had it dialed. Any insight? Thanks in advance. Jason
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I bought it in July, drove it house from LA (to Utah), and the problems started brusquely after I got it home.Any other put up to you can have the funds for is appreciated. I don't know what else to attain but agree to it assist to the dealer. I know I've got the shop foreman committed on it at the dealer, but I still vibes its pushed to the back as its old and everyone loses in this situation.
This could be a large vacuum leak ,with the MAF linked it is single-handedly measuring the expose that is getting taking into consideration the MAF, correspondingly if the intake manifold is sucking in expose the ventilate 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. when carb cleaner spray vaporizer in the area of the hissing following the engine giving out and in imitation of you listen the engine stall or rev forward-thinking there is the leak ,could be a bad vacuum hose bad gasket on the manifold.
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