6.5 hesitates, struggles to rev. motor shake

[alee9709]

i have a 94 gmc 6.5 that kind of studders. struggles to rev up. and the motor shakes bad . but once u get it over 2500 rpms its fine. anybody know whats going on

 

[3500GMC]

Lift pump perhaps.

Any smoke, leaks or new noises?

Vaugely sounds like air bubbles in the fuel system..

 

[alee9709]

no leaks , no new noises. and smokes like a diesel should. it stops studdering after about 45 minutes of running

 

[ak diesel driver]

stock 6.5s aren't supposed to smoke. I'd suspect turbo not working properly , lift pump issues, air in fuel lines

 

[alee9709]

who ever said it was stock. it has a compleat diamond eye 4in exhaust. no cats or mufflers. and it just has a cheap k&n universal airfiter. it useto not smoke when i had the cats on it.

 

[Brooklyn Tow]

who ever said it was stock. it has a compleat diamond eye 4in exhaust. no cats or mufflers. and it just has a cheap k&n universal airfiter. it useto not smoke when i had the cats on it.

Please fill out your signiture.....

 

[alee9709]

ya how do u do that

 

[Pruittx2]

http://www.thetruckstop.us/forum/profile.php?do=editsignature