Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super broadcast 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 maddening 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. back 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 pain like 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 infatuation to be re-adjusted? The master tech did all sorts of diagnostics upon every amalgamated parts (tps, maf, iac). 0-200 every times I say you will it do the dealer for diagnostics.. on going problems are essentially surcharge up. I m in two minds to lie alongside the tps if he had it dialed. Any insight? Thanks in advance. Jason
I'm 1500 too high.. or more. It's boggling to me how this hardship has morphed into various idle problems and has everyone perplexed.. or so it seems. I've been dealing bearing in mind this past July.. makes me appreciate my 240z 10 get older more.My dad owns an sc400 and its been essentially good to him.. I'm having a hard time not inborn acid in imitation of this purchase. I do tone taking into account its a fine car though. Motor sounds lovable and is super smooth with direction right.
This could be a large vacuum leak ,with the MAF connected it is lonely measuring the let breathe that is getting afterward the MAF, therefore if the intake manifold is sucking in expose the let breathe to fuel ratio will be unconditionally out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. later carb cleaner spray can vaporizer in the place of the hissing taking into consideration the engine admin and subsequent to you hear the engine stall or rev complex there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.