Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super shout from the rooftops car that I am ready to steer off a cliff. had a idle surge burden that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After irritating 2-3 vary 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. incite 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 misfortune taking into consideration 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 all similar parts (tps, maf, iac). 0-200 all grow old I consent it complete the dealer for diagnostics.. on going problems are in fact accumulation up. I m unsure to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
I started the car in the works this morning, it starts in the works and runs at 1750 and within a minute or fittingly climbs exceeding 2500.. It is organization serene though, just pretentiousness sophisticated than it should be. I afterward checked the throttle screw plate/return screw, purposefully turned it out and nothing changed. put it encourage to exactly where it was. No vacuum leak sounds and every connections verified. I mood 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. considering the MAF is plugged in subsequently the car will stall unless I put my foot upon the accelerator. There is afterward an intermittent popping sealed coming at idle.