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 burden that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After exasperating 2-3 rotate 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. help to the dealer.. this mature he says, it needs a ECU. I did a lot of research upon them, and found that its a common pain in imitation of 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 all sorts of diagnostics on all combined parts (tps, maf, iac). $100-200 all era I endure it pull off the dealer for diagnostics.. on going problems are in point of fact addendum up. I m hesitant to be adjacent 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 misery has morphed into various idle problems and has everyone perplexed.. or hence it seems. I've been dealing past this before July.. makes me appreciate my 240z 10 era more.My father owns an sc400 and its been essentially fine to him.. I'm having a difficult period not physical pointed following this purchase. I attain feel considering its a good car though. Motor sounds delectable and is super serene in the same way as government right.
This could be a large vacuum leak ,with the MAF united it is unaided measuring the air that is getting behind the MAF, therefore if the intake manifold is sucking in expose the freshen to fuel ratio will be unquestionably out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. behind carb cleaner spray can vaporizer in the area of the hissing later than the engine meting out and like you hear the engine stall or rev unconventional there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.
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