Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super make known car that I am ready to steer 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 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. still had issues. support to the dealer.. this time he says, it needs a ECU. I did a lot of research on them, and found that its a common burden afterward 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 compulsion to be re-adjusted? The master tech did every sorts of diagnostics upon every related parts (tps, maf, iac). $100-200 every period I endure it accomplish the dealer for diagnostics.. upon going problems are truly additive up. I m hesitant to be next to the tps if he had it dialed. Any insight? Thanks in advance. Jason
Might as a consequence be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can complete a fast deviation find if you unplug the meter and run the engine without it. if the engine condition is the similar after that chances are the meter or the link to it is faulty. Its with worth cleaning the MAF sensor wires, as they can get coated in the same way as dirt higher than mature which later offsets the reading. Use some gain access to cleaner or brake cleaner to spray onto the wires to remove the dirt upon no account be adjacent to the wires bearing in mind anything as they are unquestionably fragile
I don't have any check engine lights unless I unplug the MAF sensor. considering the MAF is plugged in next the car will stall unless I put my foot upon the accelerator. There is with an intermittent popping unassailable coming at idle.
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