post #1 of Old 04-09-2012, 12:32 PM Thread Starter
csmith28269
Registered User
1946 CJ2A 
 
Join Date: Apr 2012
Location: Charlotte
Posts: 5
No fuel to fuel pump on stock 1946 CJ2A

I have a "new to me" 1946 CJ2A more or less original. It was not running when I recieved it but engine turns over OK and all fluids are in decent shape, it was supposedly running in the past 6 months. It will crank and fire for a few seconds on starter fluid sprayed directly into the carb. It is not getting fuel to the fuel pump. I have replaced the fuel pump with a brand new original replacement and run a new, rubber fuel line from a gas can directly to the fuel pump intake to eliminate any issues with clogged fuel line, gas tank, etc. but still not getting any fuel into the fuel pump bowl.

Does anyone have any ideas on what else to check before moving to a more drastic tear down?

Thanks all for any assistance you can provide!

csmith28269 is offline  
post #2 of Old 04-09-2012, 01:17 PM
Jon In Tucson
Senior Member
 
Jon In Tucson's Avatar
1983 CJ5 
 
Join Date: Aug 2008
Location: Tucson
Posts: 886
Is the new fuel pump actually pumping fuel? Break loose the fuel line at the carb and make certain it is pumping fuel up to the carb. Have a helper turn the engine over while you hold the fuel line in a clean metal container. Inside of 30 seconds or less the fuel pump should move almost a 2 cups of fuel into your can. If the pump passes that test, then look at the carb for a blockage, plugged passage, or varnish in the bowl. If you move the accelerator linkage you should see a stream of fuel shooting in the throat of the carb. If not, then possible places to look are: a stuck needle valve or bowel float assembly, accelerator pump diaphragm dried up and not working.

Bottom line... If the fuel pump works and the fuel filter is good, then the next place to look is the carb.

God bless.
Jon In Tucson

Jeremiah 17:7 "But blessed is the man who trusts in the Lord, whose confidence in Him."

"The secret to a Jeep, especially a CJ, is you can't
panic." - Mike

"I may not be a smart man, Jenny, but I do know grounds."
Jon In Tucson is offline  
post #3 of Old 04-09-2012, 02:00 PM Thread Starter
csmith28269
Registered User
1946 CJ2A 
 
Join Date: Apr 2012
Location: Charlotte
Posts: 5
That's the problem, the fuel pump is not pumping anything through. There is no fuel in the fuel pump while / after cranking so nothing is getting to the carb. It's a brand new fuel pump and I'm running a new, rubber fuel line directly from a gas can so I know there's no obstruction of fuel before the pump.
csmith28269 is offline  
post #4 of Old 04-09-2012, 02:23 PM
Balvar24
Registered User
1979 CJ7 
 
Join Date: Mar 2008
Location: Rock Ridge
Posts: 5,169
Is the cam engaging the fuel pump lever? Does the fuel line go to the BOTTOM of the fuel can?

"Work hard, rock hard, eat hard, sleep hard, grow big, wear glasses if you need 'em."
Balvar24 is offline  
post #5 of Old 04-09-2012, 02:30 PM
Moncheche
Registered User
 
Join Date: Jun 2011
Location: Garden Prairie
Posts: 9
Hmmm, have you tried any priming? Get a little fuel into to pump from the carb side, then crank to see if it will then draw fuel. Just a thought.
Moncheche is offline  
post #6 of Old 04-09-2012, 02:31 PM
pman
Web Wheeler
 
pman's Avatar
1988 YJ Wrangler 
 
Join Date: Aug 2005
Location: Charleston, SC
Posts: 1,481
Quote:
Originally Posted by Balvar24 View Post
Is the cam engaging the fuel pump lever?
This is what I'm thinking; either that or you happened to get another bad pump?

88 Wrangler Laredo 258-999-NP231
81/76 CJ5 304-t150-Spicer 20
82 Wagoneer 360-727-NP208
82 CJ8 Scrambler 258-t5-Dana 300
http://www.jeepforum.com/forum/f8/cj...-lulu-1350563/
http://www.jeepforum.com/forum/f8/ca...epair-2709825/
pman is offline  
post #7 of Old 04-09-2012, 02:52 PM Thread Starter
csmith28269
Registered User
1946 CJ2A 
 
Join Date: Apr 2012
Location: Charlotte
Posts: 5
I'm confident on the line in the fuel can, not so on whether the cam is engaging the fuel pump arm. That's one of the first things I thought of, but don't know how to check and confirm that it's moving the fuel pump arm. Does anyone know of a way to test that?

Thanks for the help.
csmith28269 is offline  
post #8 of Old 04-09-2012, 02:53 PM Thread Starter
csmith28269
Registered User
1946 CJ2A 
 
Join Date: Apr 2012
Location: Charlotte
Posts: 5
I'll try priming it this evening, I have not tried that yet.
csmith28269 is offline  
post #9 of Old 04-09-2012, 02:56 PM
Balvar24
Registered User
1979 CJ7 
 
Join Date: Mar 2008
Location: Rock Ridge
Posts: 5,169
When you put the fuel pump on, you should feel the pump lever come in contact with the cam and give some resistance to completely mating it to the engine.

You can probaly feel the cam lobe and tell if it is worn or not. It will be dished. More dish = more wear.

I prophesy a new cam or electric fuel pump in your future.

"Work hard, rock hard, eat hard, sleep hard, grow big, wear glasses if you need 'em."
Balvar24 is offline  
post #10 of Old 04-09-2012, 03:10 PM Thread Starter
csmith28269
Registered User
1946 CJ2A 
 
Join Date: Apr 2012
Location: Charlotte
Posts: 5
Thanks, I'll check the cam lobe for wear. I guess a new cam or electric fuel pump isn't the worst that can happen. Again, thanks all for the help!
csmith28269 is offline  
post #11 of Old 04-09-2012, 04:05 PM
skizriz
Registered User
1978 CJ7 
 
Join Date: Jun 2011
Location: Scottdale
Posts: 4,908
Smear a coat of grease on the pump arm where it makes contact. See if the grease gets smeared off or not.

78 CJ7.. 258.. TH400/Dana18.. SOA/stock YJ springs.. 35" General Grabbers.. Waggy 44s.. 4.88 gears...Spartan/Lockright...Fiberglass front to rear
skizriz is offline  
post #12 of Old 09-29-2014, 06:42 PM
WillysRookieTx
Registered User
1951 CJ3A 
 
Join Date: Sep 2014
Location: Denton
Posts: 2
I'm having the exact same problem- no fuel in the glass bulb or the filter. Fuel pump is fairly new. Does it just need to be primed? How do I do that?
WillysRookieTx is offline  
post #13 of Old 09-29-2014, 07:49 PM
OrangeCJ-5
Senior Member
 
OrangeCJ-5's Avatar
1978 CJ5 
 
Join Date: Jul 2011
Location: Berkeley Springs
Posts: 830
I did that by filling the carb bowl, starting the engine and letting it run until it died. It took a couple times for the pump to start pulling fuel out of the tank and remain running.
OrangeCJ-5 is offline  
Reply

Tags
fuel , fuel pump


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
1946 CJ2A Roll Bar bass Jeep CJ Forum 4 11-13-2013 09:53 PM
Stock fuel psi for electric fuel pump??? TampaXJ Jeep CJ Forum 26 08-30-2010 01:58 PM
1946 Willys Jeep CJ2A Available Oily Jeep CJ Forum 2 07-31-2008 08:22 AM
Stock fuel pump question jennandal Jeep CJ Forum 4 12-18-2007 01:03 PM
1946 Cj2a Jeepfreak81 Jeep CJ Forum 7 01-29-2006 01:56 PM

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
Trackbacks are Off
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome