Hoping some one can point me in the right direction. Just finished up setting up LS1 wiring harness for LS1 swap project (59 Apache). Fuel pump is suppose to be computer controlled but its not coming on. Looks like i got wires setup properly. Does any one have any experience with this type of issue with LS1 swap? Thanks in advance.

Eddie

 

The fuel pump output drives a relay. It outputs a positive voltage to drive the relay coil. It isn't a switchable ground like other outputs from the pcm.

Ron