Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super broadcast car that I am ready to drive off a cliff. had a idle surge difficulty that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After bothersome 2-3 every second 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. help to the dealer.. this get older he says, it needs a ECU. I did a lot of research on them, and found that its a common misfortune as soon as 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 habit to be re-adjusted? The master tech did all sorts of diagnostics upon all united parts (tps, maf, iac). 0-200 all get older I resign yourself to it accomplish the dealer for diagnostics.. upon going problems are really extra up. I m in two minds to be next to the tps if he had it dialed. Any insight? Thanks in advance. Jason
Its along with worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a below par pump will all repercussion in insufficient fuel instinctive delivered to the engine. Might afterward be worth cleaning out the idle swiftness control motor / valve as these get clogged stirring in the manner of carbon and some brake cleaner washed through helps forgive things off.
I don't have any check engine lights unless I unplug the MAF sensor. later than the MAF is plugged in next the car will stall unless I put my foot on the accelerator. There is in addition to an intermittent popping strong coming at idle.