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 misfortune that I researched online and did tests (per the manual) on 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. urge on to the dealer.. this mature he says, it needs a ECU. I did a lot of research on them, and found that its a common misery later 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 every sorts of diagnostics upon all partnered parts (tps, maf, iac). $100-200 every times I agree to it do the dealer for diagnostics.. upon going problems are really toting up up. I m of two minds to be next to the tps if he had it dialed. Any insight? Thanks in advance. Jason
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I started the car stirring this morning, it starts up and runs at 1750 and within a minute or for that reason climbs more than 2500.. It is dealing out smooth though, just exaggeration progressive than it should be. I moreover checked the throttle screw plate/return screw, purposefully turned it out and nothing changed. put it incite to exactly where it was. No vacuum leak sounds and every contacts verified. I setting good just about them as I've been in there a bunch of times..
Hello the TPS does have an effect upon switching the car into idle mode thus I'd suggest to create distinct the throttle dish is 100% closed and not slightly beached afterward carbon. and next accustom yourself the TPS appropriately that the IDL fix is continuous to the E2 fix similar to the throttle is closed, and contact circuit when the throttle is just cracked. Don't worry roughly any voltages, the IDL edit is the in point of fact important one.
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