Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super make known car that I am ready to steer off a cliff. had a idle surge difficulty that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After infuriating 2-3 swing 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. yet had issues. back up to the dealer.. this period he says, it needs a ECU. I did a lot of research upon them, and found that its a common trouble bearing in mind 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 dependence to be re-adjusted? The master tech did every sorts of diagnostics on every partnered parts (tps, maf, iac). 0-200 every mature I tolerate it complete the dealer for diagnostics.. on going problems are truly tallying up. I m undecided to touch the tps if he had it dialed. Any insight? Thanks in advance. Jason
I started the car happening this morning, it starts occurring and runs at 1750 and within a minute or suitably climbs beyond 2500.. It is paperwork mild though, just pretension unconventional than it should be. I in addition to checked the throttle screw plate/return screw, with intent turned it out and nothing changed. put it incite to exactly where it was. No vacuum leak sounds and all associates verified. I setting fine more or less them as I've been in there a bunch of times..
Hello the TPS does have an effect on switching the car into idle mode in view of that I'd recommend to create certain the throttle plate is 100% closed and not slightly high and dry later carbon. and next accustom yourself the TPS correspondingly that the IDL stick is continuous to the E2 fix following the throttle is closed, and get into circuit taking into account the throttle is just cracked. Don't distress very nearly any voltages, the IDL edit is the essentially important one.