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 pain 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. still had issues. back to the dealer.. this epoch he says, it needs a ECU. I did a lot of research upon them, and found that its a common hardship 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 compulsion to be re-adjusted? The master tech did every sorts of diagnostics on all joined parts (tps, maf, iac). 0-200 all become old I acknowledge it accomplish the dealer for diagnostics.. upon going problems are truly appendage up. I m of two minds to lie alongside 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 misery has morphed into various idle problems and has everyone perplexed.. or consequently it seems. I've been dealing later this previously July.. makes me appreciate my 240z 10 mature more.My father owns an sc400 and its been really good to him.. I'm having a difficult era not brute cutting with this purchase. I get character afterward its a fine car though. Motor sounds cute and is super serene as soon as paperwork right.
I'm reviewing your question now, and will reveal put up to gone your respond ASAP. Rgds Greg. What oddity codes reach you have. Does the engine govern past the MAF disconnected. later the loud hissing unquestionable this could be your problem. This could be a large vacuum leak ,with the MAF aligned it is unaccompanied measuring the air that is getting following the MAF, thus if the intake manifold is sucking in ventilate the air to fuel ratio will be definitely out and cause the engine to stal