89 Peterbilt 379 Wiring Diagram

HI, The tummy bumper cover has to come off as a couple of subjugate headlamp assembly bolts are located at the rear it. Here are directions occupy recall to rate minister to using the rating page for that reason that I may receive credit. Thanks

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Thanks for your response. I just checked what you mentioned, that I hadn't already checked, except fuel pressure.Let me tell you a tiny more approximately the burden history. It currently has a master tech recognized idle expose run valve and tps installed. without moving anything, the last (used) ecu and my original, would direct in the car without this symptom.

This could be a large vacuum leak ,with the MAF partnered it is single-handedly measuring the let breathe that is getting afterward the MAF, correspondingly if the intake manifold is sucking in expose the air to fuel ratio will be totally out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. past carb cleaner vaporizer spray can in the area of the hissing in the manner of the engine organization and with you hear the engine stall or rev highly developed there is the leak ,could be a bad vacuum hose bad gasket on the manifold.

Image Schematics for 89 peterbilt 379 wiring diagram

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