After figuring out it wasn't a tune or injector problem, I thought I'd post it up here. I found a broken inner valve spring on my PRC 675 duals. Truck has had a misfire ever since the dyno session. Could this be the cause? Its #7 exhaust.

 

Yep think that could prob be your issue...

 

that could def be it. cam specs and how many miles were on the springs?

 

222/226 .602/.605 114

Only around 4000 miles. Broke the springs in religiously. Must be a bad egg.

 

damn it i just bought those springs!

 

and everyone hates on the patriots....

 

AND the Comp's

 

Pick your poison lol. Any progress on your misfire problem, Holty?

 

Just purchased new springs to see if i have a "weak" spring or something. basically just grasping at straws and throwing money/parts at it. i have no clue....

 

Haha, I feel ya. I'm more or less at that point too...you've spent way more time on yours though. Gonna do a compression test later to see if there is a fried exhaust valve. Have you checked that yet?