At low throttle levels, and around 10-35mph my truck is surging off on off on. It does it very quickly, when I get down on the throttle more or off all the way it quits. At highway speeds at the same throttle levels it doesn't do it at all. I have a capped rail, and a Stg. 3. What could this be? I've plugged the quad RP gauge in and their is no noticeable change, nor does the fuel pressure change. This is getting annoying! Any Ideas?

 

trying pegging her up to 3k and let it fall see if she hangs a little or fluters on the way back down to idle if so might want to send injectors off to be cleaned and tested.

 

Whats your definition of hanging? Stock common rails hang under my definition doing that?

 

hangin for more than a second the biggest thing to look for is the flutter or stall on the fall.