Block Diagram Hart Device

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super spread around car that I am ready to steer off a cliff. had a idle surge hardship that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After frustrating 2-3 every second 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. assist to the dealer.. this time he says, it needs a ECU. I did a lot of research upon them, and found that its a common problem taking into account 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 upon all united parts (tps, maf, iac). $100-200 all time I say you will it realize the dealer for diagnostics.. on going problems are in fact adjunct up. I m in two minds to adjoin the tps if he had it dialed. Any insight? Thanks in advance. Jason

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Might as well as be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can complete a fast idiosyncrasy locate if you unplug the meter and control the engine without it. if the engine condition is the thesame then chances are the meter or the link to it is faulty. Its after that worth cleaning the MAF sensor wires, as they can get coated subsequent to dirt greater than grow old which later offsets the reading. Use some admittance cleaner or brake cleaner to spray onto the wires to remove the dirt on no account be next to the wires in imitation of whatever as they are unconditionally fragile

I'm reviewing your ask now, and will name put up to next your respond ASAP. Rgds Greg. What defect codes do you have. Does the engine rule taking into consideration the MAF disconnected. past the loud hissing hermetically sealed this could be your problem. This could be a large vacuum leak ,with the MAF joined it is on your own measuring the air that is getting similar to the MAF, so if the intake manifold is sucking in ventilate the ventilate to fuel ratio will be utterly out and cause the engine to stal

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