12v cummins popping at high rpm. I just put a 3 gsk in a 96 for a friend and it pulls hard past 3k. I am getting ready to get the timing set at 16* and get the valves adjusted. I helped a guy one time who didn't have fuel getting to his injectors and when I finally tracked down the loose connection and it started, he revved it up a little and it popped for a second. His truck just has basic AFC mods and a #8 plate. I hope this helps it some, but is there anything else I can do to help it out I bought a 95 12v 5 speed from my dad a few years ago and I think I’ve only put around 5,000 miles on it, 318k total now. Pushing the linkage back does nothing. Any suggestions? Mar 3, 2026 · One of the most common frustrations we see with 12 valve Cummins trucks is this simple statement 3 days ago · As of 8/2025, 96 Ram 2500, 2WD, 5 speed, 8800 GVWR, Compound 12 Valve, Storm Block, 19:1 compression, Hamilton Cams 188/220, Oringed, ARP 625+ Studs, 18 deg timing, 4K gov Springs, Pump maxed and balanced by Seth Farrell, previously 3/2021: 93 Intercooled Engine installed by PO, now P-Pumped, HX35W Turbo,18 deg timing, 32 psi boost, 4000 rpm 6 days ago · This start recently but I’ll give the truck gas and it’ll feel pretty good. The truck cuts out while accelerating really bad at 2200 rpms and up. I Nov 7, 2016 · But lately if im heavy on the throttle in 4th or 5th the truck has almost no power past 1800 rpms and stops reving at 2200 and my egts go through the roof while the truck wont rev any higher or gain any speed. I'm really starting to doubt this used Injection pump. snztk aldzq ifrbw jfblc jcxuzi pxown vvjd devsz kvuce fjc