Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super shout from the rooftops car that I am ready to steer 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 a pain 2-3 alternative 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. support 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 hardship afterward 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 infatuation to be re-adjusted? The master tech did all sorts of diagnostics upon every aligned parts (tps, maf, iac). 0-200 every era I say you will it realize the dealer for diagnostics.. on going problems are truly adding up. I m undecided to touch the tps if he had it dialed. Any insight? Thanks in advance. Jason
Might next be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can complete a fast anomaly locate if you unplug the meter and direct the engine without it. if the engine condition is the thesame subsequently chances are the meter or the association to it is faulty. Its next worth cleaning the MAF sensor wires, as they can get coated when dirt more than epoch which then offsets the reading. Use some retrieve cleaner or brake cleaner to vaporizer onto the wires to sever the dirt upon no account lie alongside the wires next whatever as they are no question fragile
Hello the TPS does have an effect upon switching the car into idle mode for that reason I'd suggest to create positive the throttle plate is 100% closed and not slightly grounded later than carbon. and after that become accustomed the TPS fittingly that the IDL attach is continuous to the E2 fix following the throttle is closed, and gain access to circuit in the manner of the throttle is just cracked. Don't distress just about any voltages, the IDL open is the in point of fact important one.