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1990 Chevy Van I INSTALLED A NEW FUEL PUMP AND IT DONT WORK

Tiny
MONSHEEKA
  • MEMBER
  • 1990 CHEVROLET VAN
  • V8
  • 2WD
  • AUTOMATIC
  • 98,000 MILES
I INSTALLED A NEW FUEL PUMP, WITHOUT DISCONNECTING THE BATTERY CABLE. NOW, THE FUEL PUMP DOES NOT WORK. WHAT IS THE CAUSE OF THE PROBLEM, AND HOW DO I SOLVE IT?
Sunday, May 16th, 2010 AT 5:07 PM

5 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
When you turn key on do you hear the fuel pump come on? If not check the fuel pump fuse and fuel pump relay. If so check the fuel pressure if its within specs even though its new might be coming on but not producing pressure.
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Sunday, May 16th, 2010 AT 5:22 PM
Tiny
CONSAKA
  • MEMBER
  • 31 POSTS
Solve it by first troubleshooting the problem. Unplug the pump and verify you have voltage at the wires. It is possible you got a new pump that was bad. Happens all the time.
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Tuesday, May 25th, 2010 AT 10:07 AM
Tiny
RASMATAZ
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Dunno -but they do fail though its new
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Tuesday, May 25th, 2010 AT 4:22 PM
Tiny
CONSAKA
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More then one? If more then one fails it is time to start looking as to why? What part is failing? Is it the motor winding? The wires where it plugs in? Further testing should reveal the problem area.
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Tuesday, May 25th, 2010 AT 5:50 PM
Tiny
RASMATAZ
  • MECHANIC
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Check and test the fuel pump relay it powers the fuel pump for 2 secs then deactivates, when engine fires up the fuel pump/oil pressure sending unit powers the pump constantly-could be a voltage drop problem also check the ground side of the fuel pump
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Tuesday, May 25th, 2010 AT 5:58 PM

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