Stumbling

[stlboarder]

On my way home from work today my truck started to stumble under load. When I take off from a stop or am at moderate throttle it runs fine. I checked all my electrical connections and vacume lines are all hooked up. What could it be?

 

[89_Black_Beast]

when you find out let me know... I'm havin the same trouble with mine and haven't solved the problem yet