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Fuel pump

Tiny
THEPIG46
  • MEMBER
  • 1995 GMC VAN
  • V8
  • 2WD
  • AUTOMATIC
  • 225,000 MILES
We've checked from the top of the tank to the outside of the fuel filter the pressure reads 10 lbs. On the old one and the new one. What should it read?
Sunday, January 16th, 2011 AT 3:49 AM

4 Replies

Tiny
OBXAUTOMEDIC
  • MECHANIC
  • 3,711 POSTS
Hello,

Ok, since it is fuel injected it should be at least 40 - 60 psi. Now you said you check to the outside of fuel filter, does that mean you tested by hooking to the fuel filter? If so try hooking up to line without fuel filter. Also dump fuel from tank side filter if black replace filter.

You also need to check voltage at tank.
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Sunday, January 16th, 2011 AT 4:08 AM
Tiny
THEPIG46
  • MEMBER
  • 3 POSTS
Hi, obxautomedic, I put a fuel test "T" and new filters, and pressure is still only 10 lbs. Contacted parts place and they said to get second opinion before returning pump. It is susposed to be 40 psi on the outside of the filter. So i'm at a loss on this. Thanks for ur quick reply.
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Sunday, January 16th, 2011 AT 4:28 AM
Tiny
THEPIG46
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P.S. What is the voltage at the tank susposed to be?
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Sunday, January 16th, 2011 AT 5:01 AM
Tiny
OBXAUTOMEDIC
  • MECHANIC
  • 3,711 POSTS
Should have 12 volts at Tank and Pump.
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Sunday, January 16th, 2011 AT 5:19 PM

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