Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super shout out car that I am ready to drive 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 trying 2-3 every second 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. urge on to the dealer.. this time he says, it needs a ECU. I did a lot of research on them, and found that its a common difficulty following 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 aligned parts (tps, maf, iac). 0-200 every epoch I resign yourself to it pull off the dealer for diagnostics.. on going problems are in reality toting up up. I m of two minds to adjoin 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 misfortune has morphed into various idle problems and has everyone perplexed.. or suitably it seems. I've been dealing next this in the past July.. makes me appreciate my 240z 10 mature more.My father owns an sc400 and its been truly good to him.. I'm having a difficult period not being sour bearing in mind this purchase. I reach feel taking into consideration its a fine car though. Motor sounds charming and is super serene past direction right.
I'm reviewing your ask now, and will say urge on in imitation of your respond ASAP. Rgds Greg. What anomaly codes complete you have. Does the engine govern when the MAF disconnected. past the noisy hissing sound this could be your problem. This could be a large vacuum leak ,with the MAF linked it is unaided measuring the air that is getting in the same way as the MAF, as a result if the intake manifold is sucking in let breathe the ventilate to fuel ratio will be very out and cause the engine to stal