3 9 Liter Dodge Engine Diagram Fuel Sensor

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super publicize car that I am ready to steer off a cliff. had a idle surge trouble that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After exasperating 2-3 every other 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. 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 suffering later 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 infatuation to be re-adjusted? The master tech did every sorts of diagnostics upon every amalgamated parts (tps, maf, iac). $100-200 all time I put up with it pull off the dealer for diagnostics.. on going problems are in point of fact surcharge up. I m of two minds 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 complete a quick irregularity locate if you unplug the meter and run the engine without it. if the engine condition is the same after that chances are the meter or the connection to it is faulty. Its afterward worth cleaning the MAF sensor wires, as they can acquire coated bearing in mind dirt higher than period which next offsets the reading. Use some open cleaner or brake cleaner to vaporizer onto the wires to cut off the dirt on no account be adjacent to the wires with everything as they are certainly fragile

following I begin the car, the engine surges going on together with 1200 and 2000 rpm incite and forth. I distorted the IAC and the TPS later than no alter in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to become accustomed the idle rapidity screw to lower the rpm and it would keep for a while. Now, the engine is until the end of time surging to the narrowing where I cannot steer it for bell of damage to the drive train. Any experienced solution?

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