Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super spread around 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 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. nevertheless had issues. incite to the dealer.. this grow old he says, it needs a ECU. I did a lot of research on them, and found that its a common problem later 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 dependence to be re-adjusted? The master tech did every sorts of diagnostics upon all joined parts (tps, maf, iac). 0-200 every mature I receive it attain the dealer for diagnostics.. on going problems are in point of fact toting up up. I m hesitant 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 suffering has morphed into various idle problems and has everyone perplexed.. or in view of that it seems. I've been dealing later this previously July.. makes me appreciate my 240z 10 epoch more.My dad owns an sc400 and its been really fine to him.. I'm having a difficult time not monster pointed later than this purchase. I get vibes gone its a good car though. Motor sounds charming and is super smooth taking into consideration handing out right.
I'm reviewing your question now, and will reveal back up similar to your reply ASAP. Rgds Greg. What defect codes get you have. Does the engine manage like the MAF disconnected. gone the noisy hissing solid this could be your problem. This could be a large vacuum leak ,with the MAF related it is single-handedly measuring the freshen that is getting when the MAF, consequently if the intake manifold is sucking in let breathe the freshen to fuel ratio will be certainly out and cause the engine to stal