Hey everyone,
This past summer, I purchased a Forestry Service '91 Suburban. The past owner had mentioned fuel pump issues, so the shop I bought it from had already replaced the fuel pump. For a while, everything was going pretty smoothly. I even took the truck on a 1,000+ mile road trip down and back up the West coast without issues.
Right after I got back, I took my truck to work. When I went to leave, the engine would turn over but not start. The fuel pump did not seem to be getting any power. The ECM-B fuse had been blown, and any replacement fuses would immediately be blown when I began to turn over the engine. I ended up replacing the fuel pump relay and the oil pressure sending unit, which seemed to fix the problem.
A couple of weeks ago, I was on my way to visit a friend's house. I hit a speed bump a little harder than usual, and I immediately lost power. My ECM-B fuse had blown again. Currently, the replacement fuse is working, but I'm afraid to drive the truck anywhere before this issue is resolved.
At this point, I am mostly interested in bypassing the relay and sending unit with a direct wire to the fuel pump. Is there anyone who has done this before who could offer some advice? Any guidance would be greatly appreciated.