fuel pump relay

  1. ShlamueL

    89 carb swap relay wiring

    I am trying to figure out where to wire these for a carburetor swap. I’ve seen some great threads already but sadly it seems everybody has a different relay harness. So I’m seeing if anybody has done one on this specific one.(if there is a thread with this harness please link me!). From what...
  2. D

    Fuel Delivery on Cold starts?

    So I have a 1996 C3500 with a 350 Vortec. I have an issue on cold start. It runs okay after starting, with a caveat of some engine rpm stumbling. It recently died on me while idling, and wouldn’t start back up, leaving me to tow it back home. Now its more of a crank no start as opposed to a...
  3. KCusick81

    Fuel pump? - Results of electrical testing at fuse box - What does this indicate?

    Good evening all, I'm in need of some help diagnosing the latest issue with my 1997 K1500 5.7. How it started: About a week ago, I was driving my daughter home from school. I stopped at a stop sign and my truck shut off. No spitting or sputtering. No warning, just shut off. The truck would...
  4. G

    fuel pump relay ground and power

    1997 GMC Yukon 5.7 vortec 4X4 This started 10 minutes or so after I left a car wash, it didn't spit or sputter just died on the road. After a fair bit of diag and changing the pump i discovered that pin 87 ( should just be constant power ) is also a ground to the body. I don't know how this is...
  5. M

    1988 GMC K1500 Fuel Pump Relay Wiring -- Need Urgent Help

    So, I got this 1988 GMC Sierra SLX a year and a half ago, the original engine's oil pump got clogged up with some kind of silver flakes, radiator exploded, dropped a new engine in it, in the process of getting it dialed in and timed, a buddy advanced the timing way too far after I switched the...

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