Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super shout out car that I am ready to drive off a cliff. had a idle surge misfortune that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After exasperating 2-3 rotate 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 period he says, it needs a ECU. I did a lot of research on them, and found that its a common burden as soon 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 craving to be re-adjusted? The master tech did every sorts of diagnostics upon all linked parts (tps, maf, iac). $100-200 all times I acknowledge it reach the dealer for diagnostics.. on going problems are in reality calculation up. I m undecided to be next to the tps if he had it dialed. Any insight? Thanks in advance. Jason
I’m 1500 too high.. or more. It’s boggling to me how this burden has morphed into various idle problems and has everyone perplexed.. or consequently it seems. I’ve been dealing taking into consideration this since July.. makes me appreciate my 240z 10 epoch more.My daddy owns an sc400 and its been in reality good to him.. I’m having a difficult period not inborn cutting later this purchase. I get tone once its a fine car though. Motor sounds lovely and is super mild once direction right.
I’m reviewing your question now, and will proclaim assist afterward your answer ASAP. Rgds Greg. What malfunction codes realize you have. Does the engine run with the MAF disconnected. gone the loud hissing unquestionable this could be your problem. This could be a large vacuum leak ,with the MAF connected it is unaccompanied measuring the ventilate that is getting bearing in mind the MAF, for that reason if the intake manifold is sucking in ventilate the let breathe to fuel ratio will be extremely out and cause the engine to stal
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