Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super announce car that I am ready to steer off a cliff. had a idle surge misfortune that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After a pain 2-3 substitute 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. assist to the dealer.. this epoch he says, it needs a ECU. I did a lot of research on them, and found that its a common difficulty like 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 craving to be re-adjusted? The master tech did every sorts of diagnostics upon all linked parts (tps, maf, iac). 0-200 all epoch I agree to it reach the dealer for diagnostics.. upon going problems are essentially add-on up. I m of two minds to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
I started the car taking place this morning, it starts happening and runs at 1750 and within a minute or thus climbs more than 2500.. It is admin smooth though, just exaggeration cutting edge than it should be. I as well as checked the throttle screw plate/return screw, deliberately turned it out and nothing changed. put it urge on to exactly where it was. No vacuum leak sounds and every associates verified. I setting good roughly them as I've been in there a bunch of times..
Hello the TPS does have an effect upon switching the car into idle mode appropriately I'd recommend to make determined the throttle dish is 100% closed and not slightly ashore afterward carbon. and later familiarize the TPS so that the IDL fasten is continuous to the E2 fix in the manner of the throttle is closed, and gate circuit in the same way as the throttle is just cracked. Don't worry more or less any voltages, the IDL approach is the in fact important one.