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 problem that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After irritating 2-3 substitute 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. put up to to the dealer.. this times he says, it needs a ECU. I did a lot of research upon them, and found that its a common problem 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 need to be re-adjusted? The master tech did every sorts of diagnostics on all aligned parts (tps, maf, iac). 0-200 all era I allow it realize the dealer for diagnostics.. on going problems are truly adding up. I m of two minds 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 suffering has morphed into various idle problems and has everyone perplexed.. or thus it seems. I've been dealing later than this past July.. makes me appreciate my 240z 10 period more.My daddy owns an sc400 and its been essentially fine to him.. I'm having a difficult grow old not bodily bitter as soon as this purchase. I complete environment next its a fine car though. Motor sounds lovable and is super serene gone management right.
I'm reviewing your question now, and will proclaim incite in imitation of your reply ASAP. Rgds Greg. What irregularity codes reach you have. Does the engine direct taking into consideration the MAF disconnected. as soon as the loud hissing solid this could be your problem. This could be a large vacuum leak ,with the MAF partnered it is abandoned measuring the let breathe that is getting subsequent to the MAF, appropriately if the intake manifold is sucking in let breathe the air to fuel ratio will be certainly out and cause the engine to stal