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 trouble that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After exasperating 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. back to the dealer.. this grow old he says, it needs a ECU. I did a lot of research upon them, and found that its a common misery like 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 every sorts of diagnostics upon all aligned parts (tps, maf, iac). 0-200 every grow old I agree to it complete the dealer for diagnostics.. on going problems are essentially calculation up. I m of two minds to touch the tps if he had it dialed. Any insight? Thanks in advance. Jason
I started the car happening this morning, it starts stirring and runs at 1750 and within a minute or fittingly climbs exceeding 2500.. It is paperwork smooth though, just exaggeration later than it should be. I with checked the throttle screw plate/return screw, with intent turned it out and nothing changed. put it assist to exactly where it was. No vacuum leak sounds and every links verified. I feel fine approximately them as I've been in there a bunch of times..
Hello the TPS does have an effect on switching the car into idle mode suitably I'd suggest to make certain the throttle plate is 100% closed and not slightly stuck later than carbon. and after that acclimatize the TPS fittingly that the IDL fix is continuous to the E2 attach next the throttle is closed, and entre circuit in the manner of the throttle is just cracked. Don't worry roughly any voltages, the IDL approach is the in fact important one.