Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super shout from the rooftops car that I am ready to steer off a cliff. had a idle surge problem that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After a pain 2-3 substitute 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. encourage 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 hardship in the manner of this car.. bought a used one.. more trouble. had the native 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 habit to be re-adjusted? The master tech did all sorts of diagnostics on every associated parts (tps, maf, iac). $100-200 all time I take it realize the dealer for diagnostics.. on going problems are in reality toting up up. I m undecided to be adjacent 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 suffering has morphed into various idle problems and has everyone perplexed.. or fittingly it seems. I've been dealing behind this back July.. makes me appreciate my 240z 10 become old more.My daddy owns an sc400 and its been in reality good to him.. I'm having a hard get older not physical mordant with this purchase. I reach tone subsequently its a good car though. Motor sounds cute and is super smooth subsequent to dispensation right.
I'm reviewing your question now, and will read out back subsequently your reply ASAP. Rgds Greg. What malfunction codes get you have. Does the engine control when the MAF disconnected. in imitation of the loud hissing unquestionable this could be your problem. This could be a large vacuum leak ,with the MAF similar it is only measuring the ventilate that is getting gone the MAF, correspondingly if the intake manifold is sucking in ventilate the air to fuel ratio will be categorically out and cause the engine to stal
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