Just for the sake of arguement, try it with the key on. Then try it again when the key has been off for 10 minutes. The rail could bleed off completely in the time frame you stated.Originally Posted by jetersaurous
Just for the sake of arguement, try it with the key on. Then try it again when the key has been off for 10 minutes. The rail could bleed off completely in the time frame you stated.
1969 Chevy RCLB C10 350/TH400 SOLD
2007 Chevy RCSB 4.8 4x4 LS SOLD
2008 Chevy RCSB 5.3 4x4 LT SOLD
2010 Chevy CCSB 6.2 4x4 LT SOLD
2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
2013 FORD CCSB F350 6.7 Powerstroke 4x4
ok if you have any question whether it is the pump you can use a test light at the connector at the tank. And by the way the pcm actually grounds the relay, to energize the fuel pump. Most fuse blocks have a prime terminal right beside the fpump relay which can be used to test the fuel pump, all you need to do is connect a jumper between that terminal and 12 volts. But at the end of the day I am certain you are gonna have to replace that fuel pump so why waist any more time proving what you alread know?
So you can or can't hear the pump when you cycle the key? You can't just turn the key on after 24 hrs and expect fuel to squirt out. You gotta cycle it a couple times. Why do you have o2 codes? Btw sorry if I missed something
OK, it was the pump. Just replaced it tonight and it's working fantabulously now. Thank you for all of the help guys.
R.I.P Blue '02
'08 - 5.3
Vette Servo, Flowmaster 40
Glad we could help.
1969 Chevy RCLB C10 350/TH400 SOLD
2007 Chevy RCSB 4.8 4x4 LS SOLD
2008 Chevy RCSB 5.3 4x4 LT SOLD
2010 Chevy CCSB 6.2 4x4 LT SOLD
2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
2013 FORD CCSB F350 6.7 Powerstroke 4x4
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