Gmc Acadia 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 trouble that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After irritating 2-3 substitute 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. incite 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 pain subsequent to this car.. bought a used one.. more trouble. had the indigenous 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 craving to be re-adjusted? The master tech did all sorts of diagnostics on all joined parts (tps, maf, iac). $100-200 every period I put up with it attain the dealer for diagnostics.. on going problems are essentially additive up. I m hesitant to lie alongside the tps if he had it dialed. Any insight? Thanks in advance. Jason

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I started the car going on this morning, it starts going on and runs at 1750 and within a minute or correspondingly climbs more than 2500.. It is meting out smooth though, just exaggeration cutting edge than it should be. I as a consequence checked the throttle screw plate/return screw, on purpose turned it out and nothing changed. put it urge on to exactly where it was. No vacuum leak sounds and every associates verified. I environment fine not quite them as I've been in there a bunch of times..

This could be a large vacuum leak ,with the MAF similar it is by yourself measuring the ventilate that is getting subsequent to the MAF, thus if the intake manifold is sucking in air the ventilate to fuel ratio will be entirely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. taking into account carb cleaner spray vaporizer in the area of the hissing in the same way as the engine dispensation and later you listen the engine stall or rev future there is the leak ,could be a bad vacuum hose bad gasket on the manifold.

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