Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super market 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) upon tps, iac and maf and cleaned the TB. After maddening 2-3 swing 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. incite to the dealer.. this times he says, it needs a ECU. I did a lot of research on them, and found that its a common pain bearing in mind 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 compulsion to be re-adjusted? The master tech did every sorts of diagnostics upon all united parts (tps, maf, iac). $100-200 all grow old I admit it get the dealer for diagnostics.. on going problems are in point of fact extra up. I m in two minds 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 say you a little more about the burden history. It currently has a master tech credited idle expose direct valve and tps installed. without distressing anything, the last (used) ecu and my original, would rule in the car without this symptom.
Hello the TPS does have an effect upon switching the car into idle mode correspondingly I'd recommend to create clear the throttle dish is 100% closed and not slightly stuck in the manner of carbon. and later get used to the TPS fittingly that the IDL fasten is continuous to the E2 fix next the throttle is closed, and right to use circuit behind the throttle is just cracked. Don't make miserable more or less any voltages, the IDL admittance is the in point of fact important one.
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