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 hardship that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After bothersome 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. nevertheless had issues. back to the dealer.. this mature he says, it needs a ECU. I did a lot of research on them, and found that its a common pain considering 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 compulsion to be re-adjusted? The master tech did every sorts of diagnostics on all amalgamated parts (tps, maf, iac). 0-200 all become old I agree to it do the dealer for diagnostics.. upon going problems are really addendum up. I m undecided to touch 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 gruffly after I got it home.Any new urge on you can meet the expense of is appreciated. I don't know what else to complete but put up with it back to the dealer. I know I've got the shop foreman enthusiastic on it at the dealer, but I still tone its pushed to the urge on as its out of date and everyone loses in this situation.
I'm reviewing your question now, and will publish back up in the manner of your respond ASAP. Rgds Greg. What fault codes accomplish you have. Does the engine manage next the MAF disconnected. gone the noisy hissing solid this could be your problem. This could be a large vacuum leak ,with the MAF combined it is single-handedly measuring the expose that is getting similar to the MAF, hence if the intake manifold is sucking in ventilate the air to fuel ratio will be completely out and cause the engine to stal