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Fuel pump works when I put in tank, drive for 5.

Tiny
BRADTINY531
  • MEMBER
  • 1990 CHEVROLET S-10
  • 270,000 MILES
Fuel pump works when I put in tank, drive for 5 minutes and truck dies and the fuel pump makes a ch sound instead of a hum
Monday, December 31st, 2012 AT 6:19 PM

9 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Was this a new fuel pump? I'm not much good with sounds.
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Monday, December 31st, 2012 AT 6:33 PM
Tiny
BRADTINY531
  • MEMBER
  • 5 POSTS
Yes, I put in a few new ones, keep burning out within 10 minutes of driving
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Tuesday, January 1st, 2013 AT 1:06 AM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
What is the fuel pressure? Did you use a new fuel filter? Check voltage and ground. Did you check the amp draw?
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Tuesday, January 1st, 2013 AT 2:00 AM
Tiny
BRADTINY531
  • MEMBER
  • 5 POSTS
Yes, proper fuel pressure, fuel filter is newer, It works for a couple mintues, go to drive around the block and it makes a chh sound doesn't want to kick on. Is it the pump I'm buying? Preision fuel pump.
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Tuesday, January 1st, 2013 AT 4:06 AM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Did you check voltage and ground for the pump motor when problem is ongoing? Can you blow air through the fuel lines? Is the fuel tank clean? If voltage and ground are good and no pump action, the pump is faulty. Try different brand of fuel pump. I don't know what else to tell you?
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Tuesday, January 1st, 2013 AT 3:27 PM
Tiny
BRADTINY531
  • MEMBER
  • 5 POSTS
Voltage seems correct, ground was clean, I put 3 fuel pumps in all the same brand, oreillys selling default parts?
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Tuesday, January 1st, 2013 AT 5:20 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
I have no idea? Faulty voltage or ground can damage the fuel pump.
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Tuesday, January 1st, 2013 AT 5:25 PM
Tiny
BRADTINY531
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How so I check the volatage the right way?
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Tuesday, January 1st, 2013 AT 5:42 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Your fuel lines aren't trying to clog? Check the return line, make sure you can blow air through it.

There is a fuel pump test connector close to the fuel pump relay. You can use jumper wire from battery + to test connector and the pump will run. Don't need the key. Most digital multimeters have an amp setting, hook the meter in series with jumper, to check amp draw.
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Wednesday, January 2nd, 2013 AT 1:26 PM

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