This is soooo weird!!
First of all, you're limited to using a good pump from one of your other trucks if one is '87-'89. Fix the tank that doesn't work and I'll bet it will run great on that tank. The other tank pump isn't putting out enough fuel to keep the reservoir filled, so the frame pump doesn't have anything to pump.



well then i guess i baby my truck never get it over 2500rpms
even when i punch it i guess I am good at catching the power band 