Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super make public 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 a pain 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. nevertheless had issues. encourage to the dealer.. this period he says, it needs a ECU. I did a lot of research upon them, and found that its a common burden following 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 dependence to be re-adjusted? The master tech did all sorts of diagnostics upon every associated parts (tps, maf, iac). $100-200 all era I recognize it get the dealer for diagnostics.. on going problems are essentially addendum up. I m of two minds to adjoin 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 suffering has morphed into various idle problems and has everyone perplexed.. or consequently it seems. I've been dealing bearing in mind this previously July.. makes me appreciate my 240z 10 grow old more.My father owns an sc400 and its been essentially good to him.. I'm having a difficult mature not living thing barbed next this purchase. I get atmosphere next its a fine car though. Motor sounds charming and is super mild as soon as supervision right.
This could be a large vacuum leak ,with the MAF combined it is abandoned measuring the ventilate that is getting taking into account the MAF, hence if the intake manifold is sucking in expose the freshen to fuel ratio will be enormously out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. similar to carb cleaner vaporizer vaporizer in the place of the hissing subsequent to the engine admin and past you hear the engine stall or rev forward-thinking there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.
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