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 misfortune 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. yet had issues. urge on to the dealer.. this epoch he says, it needs a ECU. I did a lot of research upon them, and found that its a common hardship subsequently 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 habit to be re-adjusted? The master tech did every sorts of diagnostics upon every partnered parts (tps, maf, iac). 0-200 all time I say yes it pull off the dealer for diagnostics.. upon going problems are in reality supplement up. I m hesitant to adjoin the tps if he had it dialed. Any insight? Thanks in advance. Jason
Its moreover worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a in poor health pump will all upshot in insufficient fuel bodily delivered to the engine. Might also be worth cleaning out the idle eagerness govern motor / valve as these acquire clogged going on subsequently carbon and some brake cleaner washed through helps release things off.
I don't have any check engine lights unless I unplug the MAF sensor. with the MAF is plugged in after that the car will stall unless I put my foot on the accelerator. There is with an intermittent popping unquestionable coming at idle.