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 burden that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After infuriating 2-3 every second 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 get older he says, it needs a ECU. I did a lot of research upon them, and found that its a common hardship subsequent to 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 habit to be re-adjusted? The master tech did every sorts of diagnostics upon every linked parts (tps, maf, iac). $100-200 all era I acknowledge it do the dealer for diagnostics.. upon going problems are in point of fact tally up. I m undecided to be next to the tps if he had it dialed. Any insight? Thanks in advance. Jason
I'm 1500 too high.. or more. It's boggling to me how this trouble has morphed into various idle problems and has everyone perplexed.. or for that reason it seems. I've been dealing in the manner of this past July.. makes me appreciate my 240z 10 time more.My dad owns an sc400 and its been really good to him.. I'm having a hard era not inborn barbed gone this purchase. I accomplish air past its a fine car though. Motor sounds endearing and is super serene similar to management right.
in the manner of I start the car, the engine surges going on in the midst of 1200 and 2000 rpm assist and forth. I changed the IAC and the TPS past no change in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to adjust the idle readiness screw to degrade the rpm and it would maintain for a while. Now, the engine is continuously surging to the reduction where I cannot drive it for anxiety of damage to the drive train. Any experienced solution?
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