I have an '03, HO with a Van Aaken C-3.2 (duration-only) box, Tone Ring Mod, AFE ProGuard-7 air intake system, & a 4" Magnaflow muffler.

On, only, the HIGH level (130 HP), the engine has a "Miss" @ 2200 RPM's & 3/4 or more throttle. This "Miss" lasts for only a fraction of a second & goes away. Does not do it on the 65 HP or stock settings. You can hear it in the exhaust note & feel it, slightly. Also, on the Dyno, @ the 65 HP setting, I made 341 HP & on the 130 HP setting, the truck only made 6 more HP (347).

In researching the problem, it seemed that this was the point which the engine was running out of fuel. So, I just installed a Glacier Diesel Power GFS-392 (Walbro) fuel system. The new pump seems to move a lot of fuel. However, I still have the "Miss"!!! The engine does seem to have a slight bit more power at the higher RPM's, though.

I've sent the VA C-3.2 back to VA & it checked out fine. They added a few newest programming upgrades, at that time.

What are the chances that the small, stock turbo is running out of air at this point?

I'm a bit lost as to what to do next. Sure would appreciate any suggestions.

Thanks.

Joe F.(Buffalo)