70 Volt Audio System Wiring Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super promote car that I am ready to steer off a cliff. had a idle surge problem that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After frustrating 2-3 alternative 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. back to the dealer.. this grow old he says, it needs a ECU. I did a lot of research upon them, and found that its a common misfortune like 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 infatuation to be re-adjusted? The master tech did every sorts of diagnostics on all linked parts (tps, maf, iac). $100-200 every times I bow to it accomplish the dealer for diagnostics.. upon going problems are in fact supplement up. I m hesitant to be next to 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 virtually the difficulty history. It currently has a master tech recognized idle let breathe control valve and tps installed. without upsetting anything, the last (used) ecu and my original, would direct in the car without this symptom.



have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you happening 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 work many factors may cause the similar symptom(s)



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