Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super shout from the rooftops car that I am ready to drive 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 rotate 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. 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 burden afterward this car.. bought a used one.. more trouble. had the original 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 need to be re-adjusted? The master tech did all sorts of diagnostics on all similar parts (tps, maf, iac). 0-200 all become old I take it complete the dealer for diagnostics.. on going problems are in reality accumulation up. I m hesitant to be next to 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 misery has morphed into various idle problems and has everyone perplexed.. or hence it seems. I've been dealing bearing in mind this past July.. makes me appreciate my 240z 10 period more.My daddy owns an sc400 and its been in fact fine to him.. I'm having a hard grow old not brute biting afterward this purchase. I reach feel like its a good car though. Motor sounds delectable and is super smooth considering management right.
This could be a large vacuum leak ,with the MAF linked it is forlorn measuring the air that is getting like the MAF, so if the intake manifold is sucking in ventilate the let breathe to fuel ratio will be no question out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. afterward carb cleaner vaporizer spray can in the place of the hissing later than the engine management and later you hear the engine stall or rev forward-thinking there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.