Good to hear. Definitely look into EFI live, you won't be disappointed. The puff of smoke is not good. Need to see what your balance rates are. Also, some additive could help with the smoking issue. You injectors might be on the way out. I have tried to mod my truck for fuel economy and reliability as you can see in my sig.
Justin 2001 LB7 Silverado 2500HD LT CCSB 4x4.
EFI Live by Idaho Rob, 437K+ and rolling, Undercover Bed Cover, Vortex spray in bed liner, Westin steps, Bilstein Shocks, Road Master Active Suspension, M/A Pump Rub Kit, PPE Trans Cooler, MBRP 5" Exhaust, Edge Insight CTS, K&N drop in filter, AirDog II 100 w/ CAT 751, LLY FF Housing w/ Racor, Running on LMM Blacked out Wheels & Michelin LTX M/S2 tires.
ADRENALINE TRUCK PERFORMANCE
Lincoln Diesel Specialties