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 pain that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After bothersome 2-3 swing 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 era he says, it needs a ECU. I did a lot of research upon them, and found that its a common difficulty subsequently this car.. bought a used one.. more trouble. had the native 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 habit to be re-adjusted? The master tech did all sorts of diagnostics on every similar parts (tps, maf, iac). $100-200 every grow old I resign yourself to it pull off the dealer for diagnostics.. upon going problems are in reality tally up. I m hesitant to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
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Might also be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can attain a quick malformation find if you unplug the meter and govern the engine without it. if the engine condition is the thesame later chances are the meter or the connection to it is faulty. Its furthermore worth cleaning the MAF sensor wires, as they can acquire coated similar to dirt beyond grow old which then offsets the reading. Use some read cleaner or brake cleaner to vaporizer onto the wires to sever the dirt on no account be next to the wires behind anything as they are completely fragile
I don't have any check engine lights unless I unplug the MAF sensor. subsequently the MAF is plugged in next the car will stall unless I put my foot on the accelerator. There is furthermore an intermittent popping solid coming at idle.
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