I have a 1990 dodge 250 with a 318 4-speed and whenever I have it in 4th gear it will start out just fine but it will have little spurts of power loss but then quickly recover. This happens continuously while in 4th gear no matter at what RPM but never while in the other 3 gears.
Just wondering if anybody has any ideas on what could be causing this, Thanks.

 

Almost sounds like a miss.