The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevy/GMC Suburbans & Panels Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 08-31-2019, 03:53 PM   #1
srfinatsunset
Registered User
 
srfinatsunset's Avatar
 
Join Date: Jun 2017
Location: Oak View CA
Posts: 55
Fuel from tank to pump

The fuel pump is not pumping (sucking) fuel from the tank. I was able to get the fuel pump to pump (suck) from a 5 gallon jug that was right under the pump. The fuel tank had at least 5 gallons of fuel in it. Could it be a warn out fuel pump? Do I need to prime the fuel line? I park the burb on the street which is on a hill. Nothing crazy but gravity goes down hill. (Fuel will flows back to the tank) would an electric fuel pump be better?
Attached Images
 
srfinatsunset is offline   Reply With Quote
Old 08-31-2019, 04:04 PM   #2
Getter-Done
Senior Member
 
Getter-Done's Avatar
 
Join Date: Dec 2009
Location: TN.
Posts: 7,625
Re: Fuel from tank to pump

The sock filter on the sending unit may be clogged?
Name:  su.jpg
Views: 3189
Size:  9.7 KB







.
__________________
________________________________________________________________________________________
____________________________________________
84 Chevy K-20
63 Impala (my high school car)

http://67-72chevytrucks.com/vboard/s...Crew Cab Build
Getter-Done is offline   Reply With Quote
Old 08-31-2019, 05:50 PM   #3
HO455
Post Whore
 
HO455's Avatar
 
Join Date: Feb 2016
Location: Portland Oregon
Posts: 10,757
Re: Fuel from tank to pump

There is a short (6") piece of hose about halfway between tank and the pump on the passenger side in front of the cross member. The front line and the back line have 90* bends and the hose hooks them together.
It can get old and hard and allow air to be sucked into the line. Photo shows where it is but I have removed the bends and replaced the hose with a pair of compression fittings and a short piece of hard line.
Attached Images
 
__________________
Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.
RIP Bob Parks.
1967 Burban the WMB,1991 S(stink)-10 Blazer,1969 GTO, 1970 Javelin, 1952 F2 Ford 4X4, 29 Model A, 72 Firebird. 85 Alfa Romeo
If it breaks I didn't want it in the first place
The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377
HO455 is offline   Reply With Quote
Old 09-01-2019, 09:57 PM   #4
srfinatsunset
Registered User
 
srfinatsunset's Avatar
 
Join Date: Jun 2017
Location: Oak View CA
Posts: 55
Re: Fuel from tank to pump

I’m dealing with an auxiliary tank. And extra lines. No fuel in the lines. I don’t really want the auxiliary tank. I cut the bends out of the fuel lines and now I have a straight fuel line to the original tank. I have clear fuel filter under the the fuel pump. Durning idol fuel is trickling into the fuel filter. When I press on the throttle the engine revs up, the engine doesn’t stall. But I don’t see an increase in fuel in the fuel filter.
srfinatsunset is offline   Reply With Quote
Old 09-01-2019, 10:26 PM   #5
HO455
Post Whore
 
HO455's Avatar
 
Join Date: Feb 2016
Location: Portland Oregon
Posts: 10,757
Re: Fuel from tank to pump

Are you having issues with how the truck runs? I have never seen a clear fuel filter that was completely full even if it was mounted vertically. If the truck is running good I would toss that clear filter, put a metal one it its place and never look back.
__________________
Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.
RIP Bob Parks.
1967 Burban the WMB,1991 S(stink)-10 Blazer,1969 GTO, 1970 Javelin, 1952 F2 Ford 4X4, 29 Model A, 72 Firebird. 85 Alfa Romeo
If it breaks I didn't want it in the first place
The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377
HO455 is offline   Reply With Quote
Old 09-03-2019, 06:24 PM   #6
pwdcougar
Registered User
 
pwdcougar's Avatar
 
Join Date: Oct 2013
Location: New Jersey
Posts: 1,302
Re: Fuel from tank to pump

Have you tried to test the fuel pump? You can remove the line from the fuel filter, add a fuel line to it and observe the fuel flow when cranking the engine. Ground the coil wire and have someone standing next to you with a fire extinguisher. I've over simplified this but there should be videos on doing this. The end of the fuel line should be directed into a plastic jug.

Paul
__________________
"You know that little thing in your head that keeps you from saying things you shouldn't? Yeah well, I don't have one of those"
1969 Mercury Cougar Standard 4 speed
1969 Mercury Cougar XR7 convertible
1970 4WD Chevrolet Suburban
1997 4WD Chevrolet Silverado Extended Cab Short Bed (purchased new January 1997)
pwdcougar is offline   Reply With Quote
Old 09-04-2019, 03:18 PM   #7
vectorit
What?
 
vectorit's Avatar
 
Join Date: Jun 2007
Location: Southern California
Posts: 7,617
Re: Fuel from tank to pump

Vent plugged?
Have you tried with out the gas cap on?
Could be a plugged line in the tank from the sock degrading or filled with junk too.
__________________
Chris
1968 K20 Suburban
1972 K10 LWB PU
vectorit is offline   Reply With Quote
Old 09-04-2019, 04:01 PM   #8
srfinatsunset
Registered User
 
srfinatsunset's Avatar
 
Join Date: Jun 2017
Location: Oak View CA
Posts: 55
Re: Fuel from tank to pump

This weekend I will drop the tank and see what’s going on with it. I need to check the carb filters along with replacing the rubber tank lines.
srfinatsunset is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 04:04 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com