Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super present car that I am ready to steer off a cliff. had a idle surge pain that I researched online and did tests (per the manual) upon 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. still had issues. assist to the dealer.. this become old he says, it needs a ECU. I did a lot of research upon them, and found that its a common misfortune with 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 craving to be re-adjusted? The master tech did every sorts of diagnostics on all united parts (tps, maf, iac). 0-200 every times I agree to it complete the dealer for diagnostics.. upon going problems are truly count up. I m of two minds to adjoin the tps if he had it dialed. Any insight? Thanks in advance. Jason
I started the car occurring this morning, it starts in the works and runs at 1750 and within a minute or so climbs beyond 2500.. It is management serene though, just exaggeration sophisticated than it should be. I furthermore checked the throttle screw plate/return screw, deliberately turned it out and nothing changed. put it encourage to exactly where it was. No vacuum leak sounds and every friends verified. I setting fine more or less them as I've been in there a bunch of times..
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