Pioneer Deh P3800mp Wiring Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super promote car that I am ready to drive off a cliff. had a idle surge difficulty that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After a pain 2-3 rotate 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. incite to the dealer.. this become old he says, it needs a ECU. I did a lot of research upon them, and found that its a common trouble following 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 compulsion to be re-adjusted? The master tech did all sorts of diagnostics on all joined parts (tps, maf, iac). $100-200 every era I put up with it pull off the dealer for diagnostics.. on going problems are in point of fact adding up up. I m undecided to lie alongside the tps if he had it dialed. Any insight? Thanks in advance. Jason

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Might as well as be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can accomplish a fast malfunction find if you unplug the meter and govern the engine without it. if the engine condition is the thesame subsequently chances are the meter or the attachment to it is faulty. Its as well as worth cleaning the MAF sensor wires, as they can acquire coated taking into consideration dirt greater than period which later offsets the reading. Use some edit cleaner or brake cleaner to spray onto the wires to cut off the dirt on no account lie alongside the wires later than everything as they are completely fragile

have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you stirring to date on all maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms up and is warmed up? oftentimes in engine behave many factors may cause the thesame symptom(s)

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