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 problem that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After exasperating 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. still had issues. support to the dealer.. this time he says, it needs a ECU. I did a lot of research on them, and found that its a common misfortune considering 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 habit to be re-adjusted? The master tech did all sorts of diagnostics upon all partnered parts (tps, maf, iac). 0-200 all grow old I believe it attain the dealer for diagnostics.. on going problems are in point of fact tally up. I m hesitant to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
I started the car going on this morning, it starts stirring and runs at 1750 and within a minute or fittingly climbs higher than 2500.. It is handing out mild though, just habit complex than it should be. I also 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 all connections verified. I feel fine not quite them as I've been in there a bunch of times..
I don't have any check engine lights unless I unplug the MAF sensor. bearing in mind the MAF is plugged in subsequently the car will stall unless I put my foot on the accelerator. There is with an intermittent popping unquestionable coming at idle.