Air Bag Pressure Wiring Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super shout out car that I am ready to drive 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 a pain 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. nevertheless had issues. assist 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 with 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 dependence to be re-adjusted? The master tech did all sorts of diagnostics upon every similar parts (tps, maf, iac). $100-200 every time I allow it realize the dealer for diagnostics.. upon going problems are in point of fact adding 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 little more about the trouble history. It currently has a master tech certified idle air direct valve and tps installed. without moving anything, the last (used) ecu and my original, would control 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 on every maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms taking place and is warmed up? oftentimes in engine produce a result many factors may cause the similar symptom(s)

Image Schematics for air bag pressure wiring diagram

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