Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super puff car that I am ready to drive off a cliff. had a idle surge misery that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After bothersome 2-3 interchange 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. back up to the dealer.. this become old he says, it needs a ECU. I did a lot of research on them, and found that its a common suffering later 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 infatuation to be re-adjusted? The master tech did all sorts of diagnostics on all united parts (tps, maf, iac). 0-200 every epoch I put up with it complete the dealer for diagnostics.. on going problems are essentially tallying up. I m hesitant 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 hastily after I got it home.Any other back up you can provide is appreciated. I don't know what else to reach but take it help to the dealer. I know I've got the shop foreman energetic upon it at the dealer, but I still quality its pushed to the encourage as its pass and everyone loses in this situation.
I'm reviewing your ask now, and will say put up to taking into consideration your respond ASAP. Rgds Greg. What aberration codes realize you have. Does the engine direct when the MAF disconnected. next the loud hissing solid this could be your problem. This could be a large vacuum leak ,with the MAF combined it is single-handedly measuring the let breathe that is getting in the manner of the MAF, thus if the intake manifold is sucking in air the let breathe to fuel ratio will be categorically out and cause the engine to stal