Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super publicize car that I am ready to drive off a cliff. had a idle surge misfortune that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After exasperating 2-3 alternative 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. back up to the dealer.. this get older he says, it needs a ECU. I did a lot of research upon them, and found that its a common difficulty when 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 obsession to be re-adjusted? The master tech did every sorts of diagnostics upon all united parts (tps, maf, iac). $100-200 every epoch I understand it pull off the dealer for diagnostics.. upon going problems are in reality calculation 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 started the car up this morning, it starts going on and runs at 1750 and within a minute or therefore climbs on top of 2500.. It is meting out serene though, just way far along than it should be. I moreover checked the throttle screw plate/return screw, with intent turned it out and nothing changed. put it assist to exactly where it was. No vacuum leak sounds and every connections verified. I tone good nearly them as I've been in there a bunch of times..
Hello the TPS does have an effect on switching the car into idle mode so I'd suggest to create positive the throttle plate is 100% closed and not slightly high and dry bearing in mind carbon. and then adjust the TPS therefore that the IDL fasten is continuous to the E2 fasten with the throttle is closed, and gain access to circuit following the throttle is just cracked. Don't cause problems approximately any voltages, the IDL gain access to is the in fact important one.
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