Bmw E60 Towbar Wiring Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super spread around car that I am ready to steer off a cliff. had a idle surge trouble that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After grating 2-3 oscillate 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. help to the dealer.. this time he says, it needs a ECU. I did a lot of research upon them, and found that its a common suffering once 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 dependence to be re-adjusted? The master tech did all sorts of diagnostics on every connected parts (tps, maf, iac). $100-200 every era I take it reach the dealer for diagnostics.. on going problems are in reality add-on up. I m unsure to lie alongside the tps if he had it dialed. Any insight? Thanks in advance. Jason

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I did re-check them tho. The master tech did extensive tests upon the freshen flow meter and said it was good. with I unplug it and govern the motor, the car runs prickly and at 850ish. I can by yourself guess that my other rebuilt ecu has an issue, or the tps needs to be re-adjusted, or somehow my maf has died in the midst of all this. I don't think the tps has that much direct in the swing of rpm though? I think it without help adjusts it not far off from 1k..

when I start the car, the engine surges taking place with 1200 and 2000 rpm back and forth. I tainted the IAC and the TPS in the manner of no modify in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to adjust the idle promptness screw to lower the rpm and it would support for a while. Now, the engine is permanently surging to the narrowing where I cannot steer it for agitation of damage to the steer train. Any experienced solution?

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