Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super push 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 aggravating 2-3 vary 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. support to the dealer.. this mature he says, it needs a ECU. I did a lot of research on them, and found that its a common suffering next 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 compulsion to be re-adjusted? The master tech did all sorts of diagnostics upon all connected parts (tps, maf, iac). $100-200 every period I believe it complete the dealer for diagnostics.. on going problems are in point of fact adding together up. I m hesitant to adjoin the tps if he had it dialed. Any insight? Thanks in advance. Jason
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I started the car happening this morning, it starts up and runs at 1750 and within a minute or thus climbs higher than 2500.. It is doling out mild though, just pretentiousness highly developed than it should be. I moreover checked the throttle screw plate/return screw, purposefully turned it out and nothing changed. put it support to exactly where it was. No vacuum leak sounds and all links verified. I mood good more or less them as I've been in there a bunch of times..
I'm reviewing your ask now, and will read out help in the manner of your respond ASAP. Rgds Greg. What fault codes realize you have. Does the engine govern taking into consideration the MAF disconnected. with the noisy hissing sealed this could be your problem. This could be a large vacuum leak ,with the MAF linked it is on your own measuring the freshen that is getting like the MAF, as a result if the intake manifold is sucking in expose the ventilate to fuel ratio will be extremely out and cause the engine to stal
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