my son and i swapped a 86 bronco 2.9L and 5-speed into a 88 ford ranger that was a 2.9L with a auto, we have everything hooked up and the engine turns over fine, i can't get the fuel pump to work. i put a jumper wire on the pump and it works fine. i have power to the relay and have even tried bypassing it.and got the pump to run intermittenly. what am i missing?

 

Inertia switch?

 

tried that, i'm going to double check all the wiring

 

The 86-88 Rangers/BII's have two fuel pumps. Which pump are you playing with? The "LOW" pressure pump in the tank, or the "HIGH" pressure pump on the frame rail? Also, the 86-87 vehicles used a cartrige filter between the LOW and HIGH pumps and an in-line filter at the HIGH pressure pump. Some 88's ended up with both (My 88 Ranger XLT 4x4 2.9 had both from the factory) even thought they don't list the canister filter for the 88's.

 

we fixed our problem, it was a broken ground wire to the fuel injection, it now run great! thanks for your suggestions