check your grounds...

I think the pump runs while the key is in Start, and then only when the computer sends volts to a different solinoid in the MPI relay. I dont know how, but that is how the diagram looks.

What is the square with a slash symbol in the MPI relay? Should be a loop-de-loop solinoid symbol, but it aint.

1989 5 door montero 3.0 auto
stock original Japanese
about 200k miles