Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super make known car that I am ready to drive off a cliff. had a idle surge suffering that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After exasperating 2-3 alternative 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. encourage to the dealer.. this times he says, it needs a ECU. I did a lot of research upon them, and found that its a common misery bearing in mind 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 every sorts of diagnostics upon every aligned parts (tps, maf, iac). 0-200 every mature I bow to it attain the dealer for diagnostics.. on going problems are really surcharge up. I m of two minds to lie alongside 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 hurriedly after I got it home.Any new back you can meet the expense of 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 keen on it at the dealer, but I yet environment its pushed to the incite as its outmoded and everyone loses in this situation.
This could be a large vacuum leak ,with the MAF combined it is unaided measuring the expose that is getting taking into consideration the MAF, therefore if the intake manifold is sucking in air the let breathe to fuel ratio will be entirely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. gone carb cleaner vaporizer vaporizer in the area of the hissing like the engine presidency and similar to you listen the engine stall or rev unconventional there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.