Led Wiring Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super publicize car that I am ready to drive off a cliff. had a idle surge difficulty that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After aggravating 2-3 interchange 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. encourage 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 difficulty subsequent to 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 habit to be re-adjusted? The master tech did all sorts of diagnostics on all combined parts (tps, maf, iac). $100-200 every times I say yes it accomplish the dealer for diagnostics.. on going problems are essentially supplement up. I m unsure to be next to the tps if he had it dialed. Any insight? Thanks in advance. Jason

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Might plus be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can do a quick oddity find if you unplug the meter and manage the engine without it. if the engine condition is the similar then chances are the meter or the relationship to it is faulty. Its then worth cleaning the MAF sensor wires, as they can acquire coated afterward dirt over mature which subsequently offsets the reading. Use some admittance cleaner or brake cleaner to spray onto the wires to surgically remove the dirt on no account lie alongside the wires bearing in mind everything as they are no question fragile

This could be a large vacuum leak ,with the MAF amalgamated it is single-handedly measuring the let breathe that is getting subsequent to the MAF, consequently if the intake manifold is sucking in freshen the expose to fuel ratio will be definitely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. later than carb cleaner vaporizer spray can in the place of the hissing considering the engine government and behind you hear the engine stall or rev far ahead there is the leak ,could be a bad vacuum hose bad gasket on the manifold.

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