Fuel pump - 1994 Toyota Pickup Pickup / 1994 Toyota Pickup / Fuel pump; until I slow down to say 40 mph. Could this be a fuel pump problem , a clogged fuel filter or a fuel regulator problem. as I have no way to tell. deerlickhunting in Middle River, I am perplexed on what's the problem after changing most parts and the wiring harness, etc,. i started it and it was Fuel Pump Relay: Where Is the Fuel Pump Relay Unit Located? Where is the fuel pump relay unit located? Reply 1: What you're looking for is the circuit opening relay. Here is a wiring diagram for the circuit, it looks like the fuseable links in the system are blown if the EFI fuses are all good Image (Click to enlarge) SPONSORED LINKS 1994 Toyota Pickup No Power To The Fuel Pump.