Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super push car that I am ready to drive off a cliff. had a idle surge burden that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After irritating 2-3 swing 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. help to the dealer.. this get older he says, it needs a ECU. I did a lot of research upon them, and found that its a common burden later than this car.. bought a used one.. more trouble. had the native 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 obsession to be re-adjusted? The master tech did all sorts of diagnostics on all combined parts (tps, maf, iac). 0-200 every become old I recognize it accomplish the dealer for diagnostics.. upon going problems are really tallying up. I m unsure to adjoin the tps if he had it dialed. Any insight? Thanks in advance. Jason
Thanks for your response. I just checked what you mentioned, that I hadn't already checked, except fuel pressure.Let me say you a little more more or less the misfortune history. It currently has a master tech qualified idle ventilate manage valve and tps installed. without touching anything, the last (used) ecu and my original, would direct in the car without this symptom.
I'm reviewing your ask now, and will name urge on following your respond ASAP. Rgds Greg. What oddity codes accomplish you have. Does the engine govern taking into account the MAF disconnected. when the noisy hissing solid this could be your problem. This could be a large vacuum leak ,with the MAF aligned it is lonesome measuring the let breathe that is getting considering the MAF, hence if the intake manifold is sucking in ventilate the expose to fuel ratio will be categorically out and cause the engine to stal