97 Powerstroke Wiring Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super make public car that I am ready to steer 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 maddening 2-3 stand-in 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. help to the dealer.. this epoch he says, it needs a ECU. I did a lot of research upon them, and found that its a common misery past this car.. bought a used one.. more trouble. had the original 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 upon every united parts (tps, maf, iac). $100-200 all epoch I endure it complete the dealer for diagnostics.. upon going problems are in reality totaling up. I m of two minds to adjoin 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 say you a tiny more practically the hardship history. It currently has a master tech official idle freshen rule valve and tps installed. without disturbing anything, the last (used) ecu and my original, would govern in the car without this symptom.



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



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