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 pain that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After a pain 2-3 substitute 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. incite to the dealer.. this become old he says, it needs a ECU. I did a lot of research on them, and found that its a common misery following 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 dependence to be re-adjusted? The master tech did all sorts of diagnostics on every connected parts (tps, maf, iac). 0-200 all mature I resign yourself to it get the dealer for diagnostics.. on going problems are in fact tally up. I m of two minds to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
Might also be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can accomplish a quick deformity locate if you unplug the meter and run the engine without it. if the engine condition is the same after that chances are the meter or the association to it is faulty. Its along with worth cleaning the MAF sensor wires, as they can acquire coated in the manner of dirt beyond epoch which then offsets the reading. Use some retrieve cleaner or brake cleaner to vaporizer onto the wires to remove the dirt upon no account lie alongside the wires afterward anything as they are agreed fragile
Hello the TPS does have an effect on switching the car into idle mode appropriately I'd recommend to make determined the throttle dish is 100% closed and not slightly stuck similar to carbon. and later familiarize the TPS in view of that that the IDL stick is continuous to the E2 stick once the throttle is closed, and entre circuit taking into consideration the throttle is just cracked. Don't cause problems nearly any voltages, the IDL contact is the in fact important one.