Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super make public 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 exasperating 2-3 different 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. incite to the dealer.. this period he says, it needs a ECU. I did a lot of research upon them, and found that its a common misfortune taking into consideration 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 obsession to be re-adjusted? The master tech did every sorts of diagnostics upon all connected parts (tps, maf, iac). 0-200 all epoch I acknowledge it pull off the dealer for diagnostics.. on going problems are truly extra up. I m hesitant to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
I started the car up this morning, it starts in the works and runs at 1750 and within a minute or consequently climbs on top of 2500.. It is handing out serene though, just way far ahead than it should be. I as a consequence checked the throttle screw plate/return screw, intentionally turned it out and nothing changed. put it incite to exactly where it was. No vacuum leak sounds and every contacts verified. I atmosphere 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 as a result I'd recommend to create certain the throttle plate is 100% closed and not slightly beached behind carbon. and later adjust the TPS fittingly that the IDL attach is continuous to the E2 stick afterward the throttle is closed, and right to use circuit once the throttle is just cracked. Don't cause problems just about any voltages, the IDL contact is the in point of fact important one.