fuel draining - The 1947 - Present Chevrolet & GMC Truck Message Board Network

novafrog · 08-04-2013, 11:39 AM

what can be done to help stop the fuel from draining out of fuel lines when truck sits,some times it will run battery down be for it starts,besides drive it more,thanks guys

**LockDoc** · 08-04-2013, 12:49 PM

Quote:

Originally Posted by novafrog

what can be done to help stop the fuel from draining out of fuel lines when truck sits,some times it will run battery down be for it starts,besides drive it more,thanks guys

What kind of carb are you running? If it is a q-jet is there a filter and spring in the carb inlet? The carb inlet filter should have a check valve in it that prevents this. Quite a few people put the in line fuel filter on them and leave the carb filter out but that is the wrong thing to do...

LockDoc

In The Ten Ring · 08-04-2013, 12:59 PM

Wow that's interesting! I wonder if my Rochester Monojet (in carb filter) would do the same thing if I left out the filter?

So many great things to learn on this site! And I hope you get this issue taken care of man.

Andy4639 · 08-04-2013, 03:28 PM

The mechanical fuel pump is suppose to have a diaphragm to keep it from going back past the pump also.

68gmsee · 08-04-2013, 06:54 PM

Also would help to know what carb you have.

If it's a quadrajet it may have well plugs leaking. Common problem on them and you need to dismantle to epoxy them. You can google quadrajet well plugs leaking for tons of info.

Here's some info on a different fix. http://quadrajetparts.com/rochester-...h-t-12_21.html

novafrog · 08-04-2013, 08:18 PM

i have a brand new edelbrock,and new fuel pump,on that truck,i have a 66 gto with a edelbrock,and a camaro with q-jet,and don't have that trouble,some times they will crank a little before they start,but nothing like this truck,thanks guys

luvbowties · 08-12-2013, 02:42 PM

Look at post from Andy4639--get a new fuel pump?...would be my vote!
Sam

Lemield · 08-12-2013, 03:45 PM

I've got the same problem with two Edelbrocks...I've replaced the fuel pumps. no change in the symptoms. If my CST or my C20 sits for more than a couple of days, I have to crank them a little bit, pump the heck out of the pedal and hope they start....I've been told that this is somewhat common with Edelbrock carbs...:crazy

08-04-2013, 11:39 AM	#1
novafrog Registered User Join Date: Apr 2009 Location: dunlow wv Posts: 435	fuel draining what can be done to help stop the fuel from draining out of fuel lines when truck sits,some times it will run battery down be for it starts,besides drive it more,thanks guys __________________ 72,2wd short bed cheyenne,350,350trans,air,tilt,tach,posi 373 gears 70 nova 5.3,350 trans 80 z28 350,350,trans,bought new 03 cat. 06 gmc swb ext cab

08-04-2013, 12:59 PM	#3
In The Ten Ring Registered User Join Date: Jun 2013 Location: West Virginia Posts: 6,427	Re: fuel draining Wow that's interesting! I wonder if my Rochester Monojet (in carb filter) would do the same thing if I left out the filter? So many great things to learn on this site! And I hope you get this issue taken care of man.

08-04-2013, 03:28 PM	#4
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: fuel draining The mechanical fuel pump is suppose to have a diaphragm to keep it from going back past the pump also. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

08-04-2013, 06:54 PM	#5
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: fuel draining Also would help to know what carb you have. If it's a quadrajet it may have well plugs leaking. Common problem on them and you need to dismantle to epoxy them. You can google quadrajet well plugs leaking for tons of info. Here's some info on a different fix. http://quadrajetparts.com/rochester-...h-t-12_21.html Attached Images __________________ 68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive...

08-04-2013, 08:18 PM	#6
novafrog Registered User Join Date: Apr 2009 Location: dunlow wv Posts: 435	Re: fuel draining i have a brand new edelbrock,and new fuel pump,on that truck,i have a 66 gto with a edelbrock,and a camaro with q-jet,and don't have that trouble,some times they will crank a little before they start,but nothing like this truck,thanks guys __________________ 72,2wd short bed cheyenne,350,350trans,air,tilt,tach,posi 373 gears 70 nova 5.3,350 trans 80 z28 350,350,trans,bought new 03 cat. 06 gmc swb ext cab

08-12-2013, 02:42 PM	#7
luvbowties Registered User Join Date: Feb 2009 Location: southeasternfoothillsofusa Posts: 1,557	Re: fuel draining Look at post from Andy4639--get a new fuel pump?...would be my vote! Sam

08-12-2013, 03:45 PM	#8
Lemield Registered User Join Date: Dec 2004 Location: Arvada Colorado Posts: 1,321	Re: fuel draining I've got the same problem with two Edelbrocks...I've replaced the fuel pumps. no change in the symptoms. If my CST or my C20 sits for more than a couple of days, I have to crank them a little bit, pump the heck out of the pedal and hope they start....I've been told that this is somewhat common with Edelbrock carbs...:crazy __________________ Larry 1949 Willys CJ2A, Kubota Turbo Diesel engine, Warn Overdrive, 11 inch brakes, 12volt, Warn M8000 Winch "Little Green" 1970 Rustoleum Roller Red C20 Custom Camper 454 TH400 "Big Red" 1971 K20 6.2 Turbo Diesel 4x4 4spd Ranger Overdrive "Pumpkin Wagon" 2005 VW Beetle Diesel 44+ MPG "Silver Bullet" Last edited by Lemield; 08-14-2013 at 12:24 PM.



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