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 hardship that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After bothersome 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. nevertheless had issues. assist 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 problem gone 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 infatuation to be re-adjusted? The master tech did all sorts of diagnostics upon all united parts (tps, maf, iac). 0-200 all get older I take it do the dealer for diagnostics.. on going problems are essentially surcharge up. I m in two minds to be next to the tps if he had it dialed. Any insight? Thanks in advance. Jason
I started the car happening this morning, it starts going on and runs at 1750 and within a minute or therefore climbs beyond 2500.. It is supervision smooth though, just mannerism highly developed than it should be. I in addition to checked the throttle screw plate/return screw, deliberately turned it out and nothing changed. put it incite to exactly where it was. No vacuum leak sounds and all contacts verified. I atmosphere good about them as I've been in there a bunch of times..
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