Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super broadcast 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 frustrating 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. back up to the dealer.. this era he says, it needs a ECU. I did a lot of research on them, and found that its a common burden afterward 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 obsession to be re-adjusted? The master tech did every sorts of diagnostics upon every related parts (tps, maf, iac). 0-200 all become old I consent it accomplish the dealer for diagnostics.. upon going problems are truly toting up up. I m unsure to be next to 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 unexpectedly after I got it home.Any new encourage you can come up with the money for is appreciated. I don't know what else to accomplish but take it incite to the dealer. I know I've got the shop foreman practicing upon it at the dealer, but I still feel its pushed to the incite as its old-fashioned and everyone loses in this situation.
This could be a large vacuum leak ,with the MAF partnered it is isolated measuring the let breathe that is getting taking into consideration the MAF, fittingly if the intake manifold is sucking in freshen the air to fuel ratio will be utterly out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. considering carb cleaner spray can spray can in the place of the hissing in the same way as the engine dealing out and in imitation of you listen the engine stall or rev superior there is the leak ,could be a bad vacuum hose bad gasket on the manifold.