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Showing results for tags 'backfire'.
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So I have recently purchased a Range AFM disabler for my 2017 Silverado 1500 E-assist because of the constant stopping and starting at stop lights, exhaust drone from V4, weird shifting from V4 to V8 and my transmission liking to jerk/shifting hard every so often. After installing the Range device, it has solved my transmission issues, disabled stopping and starting at stop lights, and has been keeping it in V8 mode 24/7! The only thing I have noticed is that when I am decelerating from a speed of around 50 MPH or more, the engine will have a fast repetitive backfiring popping sound until i either get back on the gas pedal or have reached a speed of 35 MPH. It seems to happen when i am decelerating slowly and not fast, starts to backfire when it starts to downshift at around 900-1100 RPMs I have a flowmaster Super40 cat-back dual 2.5 inch exhaust with the third "cat" still on. It used to not backfire when the AFM was active BUT when decelerating, it would switch back into V4 mode. is there a way to fix this? Is there too much freeflowing exhaust? Can this backfiring through the exhaust cause any damage if left unfixed? Thanks, -Hunter
My 2014 Sierra 6.2 has 36k on it. Occasionally when I floor it going from the 1 to 2 shift and 2 to 3 it will make a backfiring noise and puffs a little dark smoke. Has anyone else heard of this issue or have any idea what would cause it? It's weird because it seems to come and go. It's stock tune with an airaid intake and gm Borla exhaust. I didn't notice it was doing it until I put the exhaust on. I've been considering a black bear tune and thinking that may help if it's a tune issue .