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1966 U14 - Unable to Keep Engine Running; Believe to be Fuel Pump Issue

RattleTheGlass

New Member
Joined
Nov 27, 2019
Messages
33
Happy Thanksgiving to All

We've got a problem where our 66 U14 stopped running, right after starting up from being parked for a few hours, the last time that we had it out on the road. She started, ran for a few seconds, I tapped the gas, and she stopped, never to run since.

I worked with a friend to start troubleshooting down the line. We can get the truck to start pretty immediately by pouring a bit of gas into the carborator, but it won't stay running. We did some tracking backwards and found that the line from the fuel pump to the carb is dry. I was able to get gas from the gas tank to the fuel pump by pressurizing the tank a bit, so we know can get to the pump, but we're not getting anything out the other side to the carb. We figure that the mechanical pump has failed.

I searched for a replacement fuel pump, but that proved to be more difficutl than expected. This is what I settled on https://www.autozone.com/external-e...48824_0_0?searchText=B1207MP&redirectUrl=true. I'm aware that it states 67 -68 for compatibility, but it does appear visually to be identical to what we had installed. I do have the vacuum windshield wipers, so I want to continue using a pump that has the vacuum line hookups.

Anybody have any ideas or information that I should know, such as incompatibility of the part for 66? Any help would be appreciated. Thanks in advance!


Regards,
Michael
 

okie4570

Contributor
Bronco Guru
Joined
Jul 16, 2012
Messages
9,364
Loc.
NW OK
Mechanical fuel pumps have been very hit or miss the last few years. I finally just put an electric pump on my 66' u15. Two bad "new" pumps back to back sealed the deal for me lol.
 
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RattleTheGlass

RattleTheGlass

New Member
Joined
Nov 27, 2019
Messages
33
Thanks, Okie. Wish your response was more encouraging. lol

Should the pump listed for 67-68 CB work in a 66, assuming it is functional?

How do you close the engine back up without a mechanic fuel pump in that spot? What did you do about the vacuum lines for the wipers?

We've kept the 66 as original as possible, and that is definitely part of the goal, so I'm still hoping to get the mechanical pump working. I've seensome information on here regarding rebuild kits for mechanical pumps and am thinking about going that route, as well.
 

serial car restorer

Contributor
Jr. Member
Joined
Aug 27, 2024
Messages
103
Loc.
Western Oregon
If a rebuild kit for your particular pump is available, that would be one of my first choices. I'd feel more confident with a pump I've rebuilt myself than some of the questionable stuff I've seen off the shelf over the past years.
 

okie4570

Contributor
Bronco Guru
Joined
Jul 16, 2012
Messages
9,364
Loc.
NW OK
Thanks, Okie. Wish your response was more encouraging. lol

Should the pump listed for 67-68 CB work in a 66, assuming it is functional?

How do you close the engine back up without a mechanic fuel pump in that spot? What did you do about the vacuum lines for the wipers?

We've kept the 66 as original as possible, and that is definitely part of the goal, so I'm still hoping to get the mechanical pump working. I've seensome information on here regarding rebuild kits for mechanical pumps and am thinking about going that route, as well.

I should have asked, is your current pump the 10 screw original 66 pump, or an 8 screw aftermarket? If it's the original, I would try to source a rebuild kit. Those were available at one point but I've not looked into it in a couple years. They make a metal block off plate that goes in place once the mechanical pump is removed.
 

73azbronco

Contributor
Bronco Guru
Joined
Nov 11, 2007
Messages
8,070
original black nylon fuel line? Might have a crack. First try a line from a gas can to pump intake see if it stays running. Be careful and do this outside of garage.
 
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