Get reading to fuel gauge,new pump and relay no power to pump
I have 1988 454 1-ton and 1990 454 1-ton both get the power supply thru the ignition modual. 99% positive that is where the problem is
SOURCE: fuel gauge bouncing on 2000 chevy tahoe where is fuel pump relay
fuel sending unit is in the tank. this is normal after about 75k miles and up. pump and sending unit are sold together. fuel sloshes from front to rear making the float on the sender rise and fall.
SOURCE: no power at fuel pump chev.S-10 looking for fuel pump relay and fuse
The fuel pump relay is located Under hood, driver side, upper firewall, mounted in
relay block.
The fuse is located under the instrument panel to the left of the steering column.
The fuse block should be visible from underneath the steering column,
near the pedal bracket. If the panel is not visible, check for a
removable compartment door or trim panel which may be used on later
models to hide the block.
SOURCE: 1996 chevy tahoe fuel system
i am having the same problem with my 96 pickup i am getting low voltage to my fuel pump i have traced the wires back to the front the purpel wire is the one with low voltage i replaced fuel pump also fuel relay and still have low voltage
SOURCE: no power to fuel pump no hum when key on and inj not pulsing
I can't speak for the electronics in your Chevy Sub. however I had experienced this same problem on my Montero and on my son's Dodge Stealth (it too is a Mitsubishi) in both cases I had spark but no injector pulse. In the end both ended up being the engine ECU units, once changed they ran and are running fine. Any chance you know someone with the same truck? If so confirm the part number and swap in their ECU unit. If your car then runs you know the answer. Good luck!
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