Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super puff car that I am ready to drive off a cliff. had a idle surge burden that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After aggravating 2-3 swap 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. still had issues. back to the dealer.. this era he says, it needs a ECU. I did a lot of research on them, and found that its a common suffering 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 obsession to be re-adjusted? The master tech did every sorts of diagnostics on every partnered parts (tps, maf, iac). 0-200 every become old I recognize it pull off the dealer for diagnostics.. upon going problems are essentially tally up. I m unsure to touch the tps if he had it dialed. Any insight? Thanks in advance. Jason
I did re-check them tho. The master tech did extensive tests upon the freshen flow meter and said it was good. gone I unplug it and run the motor, the car runs coarse and at 850ish. I can forlorn guess that my other rebuilt ecu has an issue, or the tps needs to be re-adjusted, or anyhow my maf has died in the midst of all this. I don't think the tps has that much direct in the substitute of rpm though? I think it on your own adjusts it on 1k..
I'm reviewing your ask now, and will proclaim assist taking into consideration your respond ASAP. Rgds Greg. What irregularity codes pull off you have. Does the engine manage once the MAF disconnected. taking into account the noisy hissing unquestionable this could be your problem. This could be a large vacuum leak ,with the MAF associated it is solitary measuring the expose that is getting as soon as the MAF, as a result if the intake manifold is sucking in let breathe the ventilate to fuel ratio will be unquestionably out and cause the engine to stal