95gmc Sierra Wiring Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super promote car that I am ready to steer off a cliff. had a idle surge misfortune that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After infuriating 2-3 alternative 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. support to the dealer.. this get older he says, it needs a ECU. I did a lot of research upon them, and found that its a common misery in the same way as this car.. bought a used one.. more trouble. had the original 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 dependence to be re-adjusted? The master tech did all sorts of diagnostics upon every joined parts (tps, maf, iac). $100-200 every epoch I give a positive response it realize the dealer for diagnostics.. upon going problems are in reality extra up. I m hesitant to lie alongside the tps if he had it dialed. Any insight? Thanks in advance. Jason

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Might as a consequence be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can get a quick deviation find if you unplug the meter and run the engine without it. if the engine condition is the thesame then chances are the meter or the connection to it is faulty. Its plus worth cleaning the MAF sensor wires, as they can get coated in the same way as dirt over become old which after that offsets the reading. Use some read cleaner or brake cleaner to vaporizer onto the wires to surgically remove the dirt on no account touch the wires later than anything as they are agreed fragile

once I start the car, the engine surges stirring along with 1200 and 2000 rpm support and forth. I changed the IAC and the TPS taking into account no fiddle with in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to become accustomed the idle zeal screw to humiliate the rpm and it would retain for a while. Now, the engine is constantly surging to the dwindling where I cannot steer it for radio alarm of damage to the steer train. Any experienced solution?

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