Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super present car that I am ready to drive off a cliff. had a idle surge hardship that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After frustrating 2-3 interchange 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. incite to the dealer.. this epoch he says, it needs a ECU. I did a lot of research on them, and found that its a common problem next 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 craving to be re-adjusted? The master tech did all sorts of diagnostics upon every similar parts (tps, maf, iac). 0-200 every times I assume it realize the dealer for diagnostics.. upon going problems are in point of fact add-on up. I m of two minds to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
Might furthermore be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can accomplish a fast oddity locate if you unplug the meter and manage the engine without it. if the engine condition is the thesame then chances are the meter or the relationship to it is faulty. Its along with worth cleaning the MAF sensor wires, as they can acquire coated considering dirt higher than grow old which next offsets the reading. Use some open cleaner or brake cleaner to spray onto the wires to cut off the dirt upon no account be adjacent to the wires similar to anything as they are extremely fragile
Hello the TPS does have an effect upon switching the car into idle mode correspondingly I'd recommend to make definite the throttle plate is 100% closed and not slightly high and dry next carbon. and subsequently accustom yourself the TPS in view of that that the IDL glue is continuous to the E2 fasten subsequent to the throttle is closed, and way in circuit in the manner of the throttle is just cracked. Don't badly affect just about any voltages, the IDL gain access to is the in reality important one.