fuel pumps

2003 CHEVROLET MONTE CARLO
103,941 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
ROSSROSLYN
  • MEMBER
  • 1 POST
How do You Check a fuel pump
Aug 1, 2011 at 11:25 AM
Advertisement
Avatar
JDL
  • CAR REPAIR CONTRIBUTOR
  • 16,098 POSTS
Start by using a gage and check fuel pressure.
Aug 1, 2011 at 4:17 PM
Avatar
JDL
  • CAR REPAIR CONTRIBUTOR
  • 16,098 POSTS
Just to add, engine cranking, do you have spark at the plugs?
Aug 1, 2011 at 4:22 PM
Avatar
CADIEMAN
  • CAR REPAIR CONTRIBUTOR
  • 3,544 POSTS
put fuel in the throttle body to see if it runs also.you need to check the fuel pump fuse and for fuel pump pressure as jdl said.
Aug 1, 2011 at 5:46 PM
Avatar
JDL
  • CAR REPAIR CONTRIBUTOR
  • 16,098 POSTS
If you unplug the fuel pump relay, does terminal B1 have voltage, should be hot all the time, note diagram. Use a voltage tester to check for voltage. If you use a jumper wire between terminals B1 and A3, where the relay plugs in, the pump should run. You don't need to use the key. If it won't run, check voltage and ground at fuel pump motor connector. Gray wire is voltage, black is ground. With engine cranking, if you have good voltage and ground at the fuel pump, with no pump action, suspect the pump.
Image (Click to enlarge)
Attached Media
Aug 1, 2011 at 5:58 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.