Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super announce 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 grating 2-3 interchange 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. 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 problem following 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 all sorts of diagnostics on all amalgamated parts (tps, maf, iac). 0-200 all grow old I endure it get the dealer for diagnostics.. upon going problems are in point of fact surcharge up. I m of two minds to lie alongside the tps if he had it dialed. Any insight? Thanks in advance. Jason
I started the car up this morning, it starts going on and runs at 1750 and within a minute or as a result climbs greater than 2500.. It is presidency serene though, just exaggeration forward-looking than it should be. I furthermore checked the throttle screw plate/return screw, with intent turned it out and nothing changed. put it help to exactly where it was. No vacuum leak sounds and every associates verified. I feel fine approximately them as I've been in there a bunch of times..
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