Chevy and GMC Duramax Diesel Forum - View Single Post - Help smoking after down grade
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post #9 of (permalink) Old 09-10-2019, 11:09 AM Thread Starter
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Join Date: Sep 2019
Posts: 27
Ok so took it to shop and this is where I’m at. my truck has the egr turned off from the ppie tuner. There is no block off plate. What they think is the egr is opening while I’m costing down a long hill and causing the Engine to run rich. I’m getting a scanner so I can check the mass air flow sensor while I’m doing the same down hill run. They say if the numbers are low that’s probably what’s going on. They we’re not able to open the EGR because of the tune that’s on the truck so they could not replicate the problem . I should have the scanner by end of the week so I’ll update ASAP. Thanks
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