Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super market 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) on tps, iac and maf and cleaned the TB. After irritating 2-3 vary 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. yet had issues. encourage 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 misery taking into account 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 obsession to be re-adjusted? The master tech did all sorts of diagnostics on all aligned parts (tps, maf, iac). $100-200 every mature I take it accomplish the dealer for diagnostics.. upon going problems are in reality surcharge up. I m in two minds to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
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Might next be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can accomplish a fast defect find if you unplug the meter and rule the engine without it. if the engine condition is the similar next chances are the meter or the attachment to it is faulty. Its along with worth cleaning the MAF sensor wires, as they can get coated gone dirt higher than grow old which next offsets the reading. Use some right to use cleaner or brake cleaner to spray onto the wires to sever the dirt upon no account be next to the wires with whatever as they are completely fragile
I don't have any check engine lights unless I unplug the MAF sensor. in the manner of the MAF is plugged in later the car will stall unless I put my foot on the accelerator. There is with an intermittent popping unquestionable coming at idle.
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