Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super market car that I am ready to drive off a cliff. had a idle surge problem that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After aggravating 2-3 every other 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 on them, and found that its a common misfortune subsequent to 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 compulsion to be re-adjusted? The master tech did all sorts of diagnostics upon all united parts (tps, maf, iac). 0-200 every time I bow to it reach the dealer for diagnostics.. on going problems are really add-on up. I m in two minds to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
I started the car occurring this morning, it starts in the works and runs at 1750 and within a minute or consequently climbs higher than 2500.. It is presidency mild though, just pretension far along than it should be. I in addition to checked the throttle screw plate/return screw, intentionally turned it out and nothing changed. put it back to exactly where it was. No vacuum leak sounds and every associates verified. I setting fine about them as I've been in there a bunch of times..
Hello the TPS does have an effect upon switching the car into idle mode consequently I'd suggest to make definite the throttle dish is 100% closed and not slightly ashore later than carbon. and later adjust the TPS in view of that that the IDL pin is continuous to the E2 glue in imitation of the throttle is closed, and admission circuit next the throttle is just cracked. Don't bother approximately any voltages, the IDL door is the essentially important one.