Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super make public car that I am ready to steer off a cliff. had a idle surge hardship that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After trying 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. help 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 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 obsession to be re-adjusted? The master tech did all sorts of diagnostics upon all joined parts (tps, maf, iac). 0-200 every period I tolerate it attain the dealer for diagnostics.. upon going problems are in point of fact adding together up. I m undecided to adjoin the tps if he had it dialed. Any insight? Thanks in advance. Jason
I bought it in July, drove it house from LA (to Utah), and the problems started sharply after I got it home.Any supplementary back you can present is appreciated. I don't know what else to accomplish but believe it assist to the dealer. I know I've got the shop foreman working on it at the dealer, but I nevertheless setting its pushed to the assist as its pass and everyone loses in this situation.
I'm reviewing your ask now, and will read out back up taking into account your respond ASAP. Rgds Greg. What defect codes attain you have. Does the engine govern subsequently the MAF disconnected. taking into account the loud hissing solid this could be your problem. This could be a large vacuum leak ,with the MAF combined it is isolated measuring the let breathe that is getting in the manner of the MAF, consequently if the intake manifold is sucking in let breathe the air to fuel ratio will be categorically out and cause the engine to stal