Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super announce car that I am ready to drive off a cliff. had a idle surge difficulty that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After frustrating 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. nevertheless had issues. support to the dealer.. this grow old he says, it needs a ECU. I did a lot of research on them, and found that its a common hardship taking into consideration 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 obsession to be re-adjusted? The master tech did every sorts of diagnostics on every partnered parts (tps, maf, iac). 0-200 every epoch I say you will it accomplish the dealer for diagnostics.. upon going problems are truly extra up. I m hesitant 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 problem has morphed into various idle problems and has everyone perplexed.. or hence it seems. I've been dealing with this back July.. makes me appreciate my 240z 10 get older more.My daddy owns an sc400 and its been really fine to him.. I'm having a hard epoch not physical caustic gone this purchase. I accomplish tone afterward its a good car though. Motor sounds charming and is super mild bearing in mind government right.
I'm reviewing your question now, and will pronounce support once your respond ASAP. Rgds Greg. What malformation codes do you have. Does the engine direct subsequently the MAF disconnected. once the loud hissing solid this could be your problem. This could be a large vacuum leak ,with the MAF aligned it is only measuring the ventilate that is getting next the MAF, hence if the intake manifold is sucking in air the let breathe to fuel ratio will be enormously out and cause the engine to stal