Hey everybody, I have an 06 cummins with a Diablo predator programmer on it. I have a smoke stack so I can pretty much hear every sound in my exhaust. The predator has always made my truck idle weird and run at different rpms from stock but ever since I got the stack I've noticed that whenever I let off the gas there is alot of distinct knocking in the exhaust especially in tow haul. I'm just wondering if this is normal or if it could be damaging my engine? I've put it back to stock before and noticed that it still knocks just not as much and with and without the programmer it makes a sputtering noise too. Just wondering if there is anyway to stop this or if it's just fine. Truck runs great and has alot of power except the transmission is going out so maybe that could be causing this? Thank you for your help!
↧