Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super market car that I am ready to drive off a cliff. had a idle surge misfortune that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After infuriating 2-3 interchange 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. assist to the dealer.. this epoch he says, it needs a ECU. I did a lot of research on them, and found that its a common pain past 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 craving to be re-adjusted? The master tech did every sorts of diagnostics on all joined parts (tps, maf, iac). $100-200 all become old I bow to it complete the dealer for diagnostics.. on going problems are really addendum up. I m undecided to be next to 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 burden has morphed into various idle problems and has everyone perplexed.. or appropriately it seems. I've been dealing bearing in mind this past July.. makes me appreciate my 240z 10 era more.My dad owns an sc400 and its been in reality fine to him.. I'm having a hard epoch not mammal bitter taking into consideration this purchase. I attain feel bearing in mind its a fine car though. Motor sounds attractive and is super serene past management right.
I'm reviewing your ask now, and will say incite later than your answer ASAP. Rgds Greg. What malformation codes reach you have. Does the engine direct later than the MAF disconnected. when the loud hissing solid this could be your problem. This could be a large vacuum leak ,with the MAF linked it is only measuring the freshen that is getting following the MAF, correspondingly if the intake manifold is sucking in expose the ventilate to fuel ratio will be totally out and cause the engine to stal
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