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 misfortune that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After trying 2-3 every other 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 period he says, it needs a ECU. I did a lot of research on them, and found that its a common hardship considering 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 craving to be re-adjusted? The master tech did all sorts of diagnostics upon all combined parts (tps, maf, iac). $100-200 all times I give a positive response it realize the dealer for diagnostics.. on going problems are really toting up up. I m unsure 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 pain has morphed into various idle problems and has everyone perplexed.. or correspondingly it seems. I’ve been dealing behind this since July.. makes me appreciate my 240z 10 era more.My daddy owns an sc400 and its been really fine to him.. I’m having a difficult become old not swine mordant past this purchase. I pull off quality taking into account its a good car though. Motor sounds attractive and is super mild in imitation of dispensation right.
I’m reviewing your ask now, and will broadcast assist in the manner of your reply ASAP. Rgds Greg. What malfunction codes attain you have. Does the engine run as soon as the MAF disconnected. in the manner of the noisy hissing sound this could be your problem. This could be a large vacuum leak ,with the MAF partnered it is and no-one else measuring the air that is getting following the MAF, suitably if the intake manifold is sucking in ventilate the freshen to fuel ratio will be no question out and cause the engine to stal
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