NateP350
Junior Member
- Joined
- Jun 8, 2026
- Posts
- 1
- Reaction score
- 0
- Location
- Wisconsin
- First Name
- Nate
- Truck Year
- 1987
- Truck Model
- V1500 Sierra Classic
- Engine Size
- 5.7 TBI
I have an 87 GMC with a TBI 350 that has been sitting for about 15 years. I put a known good engine in it that came with a throttle body. I have replaced almost everything in the fuel system, tanks, fuel pumps, lines, filter, relay, tank selector valve and switch. I went to start it and it cranks fine but will not start. I replaced the distributor cap, rotor and ignition module. I have spark at the plugs. I noticed my fuel pump wasn't turning on with they key so I made a connector and got the pump to run and then I had fuel at the throttle body. What would cause my fule pump to not run. Or does someone have schematics so I could test the wiring harness. I open to any ideas at this point.
Thank you
Thank you
