Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super push car that I am ready to drive off a cliff. had a idle surge problem that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After exasperating 2-3 every second 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. still 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 trouble 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 infatuation to be re-adjusted? The master tech did all sorts of diagnostics upon all partnered parts (tps, maf, iac). 0-200 all times I bow to it attain the dealer for diagnostics.. upon going problems are truly addendum up. I m hesitant to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
Might moreover be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can complete a fast irregularity locate if you unplug the meter and rule the engine without it. if the engine condition is the thesame then chances are the meter or the link to it is faulty. Its then worth cleaning the MAF sensor wires, as they can get coated in the manner of dirt over become old which next offsets the reading. Use some entre cleaner or brake cleaner to vaporizer onto the wires to separate the dirt upon no account lie alongside the wires bearing in mind everything as they are unconditionally fragile
I don't have any check engine lights unless I unplug the MAF sensor. once the MAF is plugged in subsequently the car will stall unless I put my foot upon the accelerator. There is plus an intermittent popping sealed coming at idle.