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Stock Big Block Fuel Pump #3035572
04/21/22 02:59 AM
04/21/22 02:59 AM
Joined: Jun 2013
Posts: 830
Keizer, Oregon U.S.A.
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elmor353 Offline OP
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elmor353  Offline OP
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Joined: Jun 2013
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Keizer, Oregon U.S.A.
I am having fuel pump issues on my 440. I have replaced the pump 3 times in 3 years. I can't help thinking that it's the crappy gas we have today that's causing it. Does anyone make a pump with materials that can withstand the additives in our fuel? Something that might last more than a year? Thanks.

Re: Stock Big Block Fuel Pump [Re: elmor353] #3035604
04/21/22 07:14 AM
04/21/22 07:14 AM
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Posts: 3,699
usa
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lewtot184 Offline
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i use the carter 6903 almost exclusively. gotten many years of service from one pump. i don't think the 2 valve stock replacement pumps are made domestically anymore so who knows what materials are in them. you may be getting those 3-5lb pumps that were questionable 50yrs ago. try a pressure test, fuel pump push rod length check, and make sure all hose connections are good and secured before buying another pump.

Re: Stock Big Block Fuel Pump [Re: lewtot184] #3035605
04/21/22 07:17 AM
04/21/22 07:17 AM
Joined: May 2019
Posts: 4,116
nowhere
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Sniper Offline
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I know for the flathead era fuel pumps there are companies out there that will rebuild them with quality materials. Might look around and see if someone offers that service for your pump. I don't know as I don't have a big block anymore adn there was no ethanol or chinese made pumps when I did have one.

Of just buy a better pump as suggested.

Re: Stock Big Block Fuel Pump [Re: Sniper] #3035665
04/21/22 11:24 AM
04/21/22 11:24 AM
Joined: Mar 2005
Posts: 1,434
Seattle, WA
3
375inStroke Offline
Special needs person
375inStroke  Offline
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Joined: Mar 2005
Posts: 1,434
Seattle, WA
I go through pumps more than I feel like I should, too. I had a small block one shoot the spring through the top, and I had a big block pump split in half.

Re: Stock Big Block Fuel Pump [Re: lewtot184] #3035667
04/21/22 11:26 AM
04/21/22 11:26 AM
Joined: Mar 2005
Posts: 1,434
Seattle, WA
3
375inStroke Offline
Special needs person
375inStroke  Offline
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Joined: Mar 2005
Posts: 1,434
Seattle, WA
Originally Posted by lewtot184
i use the carter 6903 almost exclusively. gotten many years of service from one pump. i don't think the 2 valve stock replacement pumps are made domestically anymore so who knows what materials are in them. you may be getting those 3-5lb pumps that were questionable 50yrs ago. try a pressure test, fuel pump push rod length check, and make sure all hose connections are good and secured before buying another pump.


Does anything need to be done to the carb to use the higher pressure Hemi pump?

Re: Stock Big Block Fuel Pump [Re: 375inStroke] #3035748
04/21/22 03:53 PM
04/21/22 03:53 PM
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Posts: 3,699
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lewtot184 Offline
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Originally Posted by 375inStroke
Originally Posted by lewtot184
i use the carter 6903 almost exclusively. gotten many years of service from one pump. i don't think the 2 valve stock replacement pumps are made domestically anymore so who knows what materials are in them. you may be getting those 3-5lb pumps that were questionable 50yrs ago. try a pressure test, fuel pump push rod length check, and make sure all hose connections are good and secured before buying another pump.


Does anything need to be done to the carb to use the higher pressure Hemi pump?
there's nothing i know of to make the carb work with 9psi other than a regulator. it is possible to use a return line with at least a .060" return orifice to help manage the pressure. 375hp 440's and street hemis had a set-up like this.

Re: Stock Big Block Fuel Pump [Re: lewtot184] #3035803
04/21/22 07:08 PM
04/21/22 07:08 PM
Joined: Jan 2003
Posts: 1,738
Harriman NY
7
71GTX471 Offline
top fuel
71GTX471  Offline
top fuel
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Joined: Jan 2003
Posts: 1,738
Harriman NY
make sure the f/p cam lobe is there.

Re: Stock Big Block Fuel Pump [Re: 71GTX471] #3036079
04/22/22 04:48 PM
04/22/22 04:48 PM
Joined: Jun 2013
Posts: 830
Keizer, Oregon U.S.A.
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elmor353 Offline OP
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elmor353  Offline OP
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Keizer, Oregon U.S.A.
I'm sure the f/p lobe is fine and I checked the push rod when I replaced the last pump. Truck was running fine, in fact my wife and I commented on how well it had been running. 5 minutes later we were sitting in line waiting to dump our trash and it just died. It's not getting fuel.

Re: Stock Big Block Fuel Pump [Re: elmor353] #3036083
04/22/22 05:23 PM
04/22/22 05:23 PM
Joined: Jun 2008
Posts: 3,699
usa
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lewtot184 Offline
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usa
check all your hose connections on the suction side of the pump and make sure you don't have a cellulose filter on that suction side.

Re: Stock Big Block Fuel Pump [Re: lewtot184] #3036193
04/23/22 02:29 AM
04/23/22 02:29 AM
Joined: Jun 2013
Posts: 830
Keizer, Oregon U.S.A.
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elmor353 Offline OP
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elmor353  Offline OP
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Joined: Jun 2013
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Keizer, Oregon U.S.A.
Replaced the pump today with the only one I could find locally. Truck fired right up and runs great. Maybe I can find a better pump before this one takes a dump. I will see if NAPA can order one for me. I'm getting too old and sore to lay on my back in the driveway. lol

Re: Stock Big Block Fuel Pump [Re: elmor353] #3036314
04/23/22 01:37 PM
04/23/22 01:37 PM
Joined: Aug 2003
Posts: 39,269
Bend,OR USA
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Cab_Burge Offline
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Cab_Burge  Offline
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Joined: Aug 2003
Posts: 39,269
Bend,OR USA
Summits offers a bunch of them, mechanical B/RB fuel pumps to choose from scope


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)






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