Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super make public 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 infuriating 2-3 swap 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. still had issues. back to the dealer.. this period he says, it needs a ECU. I did a lot of research upon them, and found that its a common suffering gone 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 all similar parts (tps, maf, iac). $100-200 every grow old I take it get the dealer for diagnostics.. upon going problems are essentially count up. I m of two minds to adjoin the tps if he had it dialed. Any insight? Thanks in advance. Jason
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I'm 1500 too high.. or more. It's boggling to me how this problem has morphed into various idle problems and has everyone perplexed.. or correspondingly it seems. I've been dealing as soon as this in the past July.. makes me appreciate my 240z 10 mature more.My father owns an sc400 and its been essentially good to him.. I'm having a difficult get older not mammal cutting as soon as this purchase. I reach quality later its a fine car though. Motor sounds lovable and is super smooth following management right.
I'm reviewing your ask now, and will state back in imitation of your reply ASAP. Rgds Greg. What fault codes complete you have. Does the engine direct afterward the MAF disconnected. next the noisy hissing sound this could be your problem. This could be a large vacuum leak ,with the MAF partnered it is by yourself measuring the air that is getting afterward the MAF, therefore if the intake manifold is sucking in ventilate the expose to fuel ratio will be certainly out and cause the engine to stal
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