While traveling down the road it will die not every time i drive it just when it feels like it! I can get out and replace the hot fuel pump relay and it will start back up. I have replaced the ground wires from the motor to the body and from the body to the frame after this problem started occurring. I just cleaned the ground from the fuel sending unit to the frame and checked the pigtail all seemed to be fine. The fuel pump relay pins are not black and the connections in the fuse box seem to look ok.
I had the same problem, if you are sure its not the pigtail on the fuel pump, pop the plastic cover off of the fuel pump relay, i used a paper shim between the points in the relay, so its always closed, worked like that several years
SOURCE: 92 Chevy Suburban Electrical Fuel System
I assume the fuel pump fuse is good?
The only time voltage will be sent to the fuel pump will be the first 2 to 3 seconds if the starter is not engaged. You will want to crank the engine over and check for voltage on the load side of the relay, circuit #30 at the relay.
Let me know after you check.
Regards,
SOURCE: our truck died while driving down the road we
that may be caused by a plugged fuel filter or fuel line, you need too replace the filter when you replace the pump.............
SOURCE: 92 Chevy Suburban Electrical Fuel System
Check fuel flter at fuel pick-up intank (looks like a small wire sock). Remove fuel filter and fitting at fuel rail. Blow out fuel lines w/about 35lbs air press. Ck electrical @ relay - should be 4 connectors - one is key on hot/one is always hot/one is ground and last is hot to fuel pump. Good Luck
SOURCE: NOT GETTING ANY GAS TO ENGINE
It's either the fuel pump or your engine control unit. Try hot wiring the pump and see if it works. If it does you need a new brain.
SOURCE: I have a 1985 Chevy C/30 pick-up with a 7.4L 454.
85 with TBI only needs 13lbs of fuel pressure. verify that the fuel filter is clean. there is no easy way to ck fuel pressure, special adapters are needed, I dont have info here at home but there should be a relay for the pump, on the firewall and the oil pressure switch also powers the pump. did you replace the pump trying to fix this problem or did you just mention it to help troubleshoot the problem? verify that the fuel pump wiring has a good ground, should have been a eyelet that bolted to the frame..when you initially turn the key on, you should hera the fuel pump power up for 2 seconds, then go off, after the engine starts, the power for the pump goes through the oil pressure switch.
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I am trying to figure out my own vehicle issue and just today read exactly what your issue most likely is. PCDM ecm relay I would read up on - Found this PDF page too that makes it easy.
http://jballelectronics.com/wp-content/u...
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