Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super announce car that I am ready to drive off a cliff. had a idle surge burden that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After maddening 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. help to the dealer.. this time he says, it needs a ECU. I did a lot of research on them, and found that its a common suffering next 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 dependence to be re-adjusted? The master tech did every sorts of diagnostics on every joined parts (tps, maf, iac). $100-200 every time I allow it accomplish the dealer for diagnostics.. on going problems are really adjunct up. I m unsure to be adjacent 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 say you a tiny more about the suffering history. It currently has a master tech endorsed idle let breathe direct valve and tps installed. without moving anything, the last (used) ecu and my original, would run in the car without this symptom.
Hello the TPS does have an effect upon switching the car into idle mode for that reason I'd recommend to create certain the throttle plate is 100% closed and not slightly stranded once carbon. and later get used to the TPS therefore that the IDL fix is continuous to the E2 pin taking into consideration the throttle is closed, and get into circuit in the same way as the throttle is just cracked. Don't bother virtually any voltages, the IDL gain access to is the in point of fact important one.
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