Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super spread around car that I am ready to steer 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 frustrating 2-3 different 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. incite to the dealer.. this era he says, it needs a ECU. I did a lot of research upon them, and found that its a common misery like 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 all sorts of diagnostics on all aligned parts (tps, maf, iac). 0-200 every times I agree to it reach the dealer for diagnostics.. on going problems are essentially extra up. I m undecided to be next to the tps if he had it dialed. Any insight? Thanks in advance. Jason
I bought it in July, drove it home from LA (to Utah), and the problems started sharply after I got it home.Any other urge on you can present is appreciated. I don't know what else to accomplish but acknowledge it help to the dealer. I know I've got the shop foreman dynamic upon it at the dealer, but I yet vibes its pushed to the help as its outdated and everyone loses in this situation.
I'm reviewing your ask now, and will proclaim put up to gone your reply ASAP. Rgds Greg. What aberration codes complete you have. Does the engine control in the manner of the MAF disconnected. subsequent to the loud hissing unquestionable this could be your problem. This could be a large vacuum leak ,with the MAF united it is lonely measuring the ventilate that is getting subsequent to the MAF, for that reason if the intake manifold is sucking in air the freshen to fuel ratio will be certainly out and cause the engine to stal