Ford F650 Wiring

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 difficulty that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After infuriating 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. yet had issues. back up 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 hardship subsequent to 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 all sorts of diagnostics upon every amalgamated parts (tps, maf, iac). $100-200 every period I resign yourself to it do the dealer for diagnostics.. on going problems are in reality additive up. I m of two minds to lie alongside the tps if he had it dialed. Any insight? Thanks in advance. Jason

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Thanks for your response. I just checked what you mentioned, that I hadn't already checked, except fuel pressure.Let me tell you a tiny more just about the trouble history. It currently has a master tech endorsed idle ventilate control valve and tps installed. without touching anything, the last (used) ecu and my original, would run in the car without this symptom.

I don't have any check engine lights unless I unplug the MAF sensor. once the MAF is plugged in after that the car will stall unless I put my foot upon the accelerator. There is with an intermittent popping hermetically sealed coming at idle.

Photo Schematics for ford f650 wiring

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