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) upon tps, iac and maf and cleaned the TB. After frustrating 2-3 swap 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 period he says, it needs a ECU. I did a lot of research on them, and found that its a common problem as soon as this car.. bought a used one.. more trouble. had the indigenous 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 craving to be re-adjusted? The master tech did all sorts of diagnostics upon every partnered parts (tps, maf, iac). 0-200 every epoch I understand it do the dealer for diagnostics.. upon going problems are truly tallying up. I m in two minds to touch the tps if he had it dialed. Any insight? Thanks in advance. Jason
Might as well as be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can complete a fast deformity locate if you unplug the meter and govern the engine without it. if the engine condition is the same after that chances are the meter or the membership to it is faulty. Its plus worth cleaning the MAF sensor wires, as they can acquire coated in the manner of dirt more than epoch which subsequently offsets the reading. Use some right to use cleaner or brake cleaner to spray can onto the wires to remove the dirt on no account be adjacent to the wires considering everything as they are categorically fragile
Hello the TPS does have an effect upon switching the car into idle mode suitably I'd recommend to create distinct the throttle plate is 100% closed and not slightly high and dry in the manner of carbon. and after that accustom yourself the TPS so that the IDL pin is continuous to the E2 stick following the throttle is closed, and admission circuit taking into consideration the throttle is just cracked. Don't trouble about any voltages, the IDL right of entry is the in reality important one.