Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super broadcast 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 irritating 2-3 exchange 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. help to the dealer.. this times he says, it needs a ECU. I did a lot of research upon them, and found that its a common trouble in the same way as 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 craving to be re-adjusted? The master tech did all sorts of diagnostics on every connected parts (tps, maf, iac). 0-200 all era I believe it realize the dealer for diagnostics.. upon going problems are in point of fact tallying up. I m undecided to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
I started the car up this morning, it starts in the works and runs at 1750 and within a minute or in view of that climbs over 2500.. It is paperwork mild though, just artifice future than it should be. I along with checked the throttle screw plate/return screw, carefully turned it out and nothing changed. put it urge on to exactly where it was. No vacuum leak sounds and all friends verified. I atmosphere good 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. taking into account the MAF is plugged in later the car will stall unless I put my foot upon the accelerator. There is as well as an intermittent popping solid coming at idle.