2000 Gmc Jimmy Replaced Fuel Pump N Filter Relay Comes On Sometimes Just Dead

2000 GMC JIMMY
200,000 MILES
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Replaced fuel pump n filter and relay n the pump comes on sometimes and sometimes it don't it just goes dead when driving wat solution do u have or Wats causing the problem

Feb 19, 2013 at 1:38 PM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
Intermittent issues can be hard to track. Id have to check voltage and ground at the fuel pump connector, when problem is ongoing. Gray wire is voltage for fuel pump motor, black is ground.

Any applicable trouble codes? Some of the national brand autostores will check codes for free.

If no initial prime could be wiring circuit/voltage or pcm. also intermittent rpm signal can drive you crazy, engine running. Initial prime doesn't use rpm signal.
Feb 19, 2013 at 2:11 PM
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