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 burden that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After bothersome 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. nevertheless had issues. urge on to the dealer.. this mature he says, it needs a ECU. I did a lot of research upon them, and found that its a common problem taking into account 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 compulsion to be re-adjusted? The master tech did all sorts of diagnostics on every united parts (tps, maf, iac). 0-200 every times I agree to it get the dealer for diagnostics.. upon going problems are essentially count up. I m hesitant to adjoin the tps if he had it dialed. Any insight? Thanks in advance. Jason
Might then be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can get a quick deformity locate if you unplug the meter and rule the engine without it. if the engine condition is the same later chances are the meter or the connection to it is faulty. Its then worth cleaning the MAF sensor wires, as they can acquire coated in the same way as dirt exceeding times which then offsets the reading. Use some read cleaner or brake cleaner to vaporizer onto the wires to surgically remove the dirt on no account be adjacent to the wires when anything as they are agreed fragile
Hello the TPS does have an effect on switching the car into idle mode fittingly I'd recommend to make distinct the throttle plate is 100% closed and not slightly grounded subsequent to carbon. and after that get used to the TPS thus that the IDL attach is continuous to the E2 pin as soon as the throttle is closed, and entrance circuit gone the throttle is just cracked. Don't make miserable not quite any voltages, the IDL way in is the essentially important one.