This might be a strange question, or just a strange problem. EXCESSIVE fuel pressure.

jfcroni

Precision Fit
Joined
Mar 3, 2013
Messages
899
Location
Midwest
First Name
Jim
Willys Model
Wagon
Willys Year:
#21
My money is on dirt in the system, holding the needle valve from closing. Stuff was apart, dirt got in somewhere. All it takes is a microscopic bit. Been there. When everything's eventually truly clean, it will be OK.
Vac on my dual pump is on top too.

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Joined
Mar 3, 2019
Messages
14
Location
Virginia
First Name
Lester
Willys Model
Wagon
Willys Year:
1958
#22
My money is on dirt in the system, holding the needle valve from closing. Stuff was apart, dirt got in somewhere. All it takes is a microscopic bit. Been there. When everything's eventually truly clean, it will be OK.
I measured 15+ psi fuel pressure before float bowel went dry from the mechanical pump. Gauge pegged at 15.
 
Joined
Jul 19, 2012
Messages
1,013
First Name
Tim
Willys Model
Wagon
Willys Year:
1952
#23
Buy an inexpensive universal electric pump and plumb it in with rubber hose, bypassing the mechanical pump and see what happens. I did that on a hunting trip once and finished the trip. I keep it and a block off plate in the tool boxes under the seat now, just in case.
 
Joined
Mar 16, 2019
Messages
6
Location
Panama City, FL
First Name
Johnny
Willys Model
Pickup
Willys Year:
1958
#25
My fuel was hooked to top when I got truck back and had the same issue, fuel gushing out carb. Rebuilt carb, tried another one and same issue. From this thread I found where it said the fuel should be at the bottom and sure enough, that fixed my problem when I swapped around. Thanks to all. Now what do I do with vacuum pump not needed, converter to electric motor earlier.
 

Blindmelon

Well Oiled
All-Star
Joined
Aug 10, 2014
Messages
1,336
Location
Agua Dulce, CA
First Name
Larry
Willys Model
Pickup
Willys Year:
1950
#28
My fuel was hooked to top when I got truck back and had the same issue, fuel gushing out carb. Rebuilt carb, tried another one and same issue. From this thread I found where it said the fuel should be at the bottom and sure enough, that fixed my problem when I swapped around. Thanks to all. Now what do I do with vacuum pump not needed, converter to electric motor earlier.
On the vacuum ports, leave them open or hook them together.. Don't just plug them..
 
Joined
Mar 3, 2019
Messages
14
Location
Virginia
First Name
Lester
Willys Model
Wagon
Willys Year:
1958
#30
Buy an inexpensive universal electric pump and plumb it in with rubber hose, bypassing the mechanical pump and see what happens. I did that on a hunting trip once and finished the trip. I keep it and a block off plate in the tool boxes under the seat now, just in case.
I did this, because I'm still assessing the condition of the rest of the Wagon before I start spending a lot of money on stuff before I know what else is wrong. I'll probibly order two rebuild kits, and rebuild my spare as well.
 
Joined
Jun 6, 2017
Messages
94
Location
woodstock GA
First Name
Steve
Willys Model
Wagon
Willys Year:
1956
#31
I believe the rebuild kits from Walck's are only for the original Carter dual action fuel pump. Will not work with replacement pump by AC. I could be wrong so check with Walck's.

Steve
 
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