Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super make public car that I am ready to drive off a cliff. had a idle surge hardship that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After irritating 2-3 stand-in 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. nevertheless had issues. support to the dealer.. this epoch he says, it needs a ECU. I did a lot of research upon them, and found that its a common trouble past 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 infatuation to be re-adjusted? The master tech did all sorts of diagnostics upon all partnered parts (tps, maf, iac). 0-200 every epoch I tolerate it do the dealer for diagnostics.. upon going problems are in reality adjunct 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 stirring this morning, it starts going on and runs at 1750 and within a minute or consequently climbs beyond 2500.. It is processing mild though, just way difficult than it should be. I after that checked the throttle screw plate/return screw, purposefully turned it out and nothing changed. put it incite to exactly where it was. No vacuum leak sounds and every connections verified. I character fine practically 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 correspondingly I'd suggest to make clear the throttle plate is 100% closed and not slightly grounded afterward carbon. and after that adjust the TPS in view of that that the IDL fix is continuous to the E2 fix once the throttle is closed, and get into circuit in imitation of the throttle is just cracked. Don't badly affect nearly any voltages, the IDL open is the really important one.