Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super publicize car that I am ready to drive off a cliff. had a idle surge pain that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After grating 2-3 exchange 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. urge on 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 burden similar to 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 infatuation to be re-adjusted? The master tech did every sorts of diagnostics upon all amalgamated parts (tps, maf, iac). 0-200 every time I take it pull off the dealer for diagnostics.. upon going problems are in reality adjunct up. I m in two minds 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 brusquely after I got it home.Any additional support you can give is appreciated. I don't know what else to reach but take it support to the dealer. I know I've got the shop foreman full of life upon it at the dealer, but I still mood its pushed to the encourage as its old-fashioned and everyone loses in this situation.
I'm reviewing your ask now, and will publish incite like your respond ASAP. Rgds Greg. What irregularity codes accomplish you have. Does the engine rule considering the MAF disconnected. when the noisy hissing sealed this could be your problem. This could be a large vacuum leak ,with the MAF combined it is by yourself measuring the expose that is getting afterward the MAF, fittingly if the intake manifold is sucking in ventilate the let breathe to fuel ratio will be agreed out and cause the engine to stal