The fuel pump is running but...
Boxcarburt
Jeeper
Hello everyone. This is my first actual post.
I am asking about a 1979 CJ7 AMC 304 .
Several times now, the jeep has started to run very rough after several minutes of driving. Occasionally she will die. When she dies, sometimes she will start right back up and sometimes she will pout for several days.
The first time this happened was 2 hours after buying her. I assumed she was out of gas so I put 5 gallons in from a new 5 gallon red tank. Started right up! I drove to the gas station that's 1/2 mile away to fill her all the way up, and put in $2...
I'm a harley guy. I traded my motorcycle for this because it's much more family friendly. So... I have the inner dialog with myself: "Does it only hold 6 gallons? I guess it could... maybe people mod Jeeps to have small tanks because it mean's less weight so it climbs better..." Then I think: "This 304 should really be able to torque it's way up a wall with a few sumo's sitting in it! The tank weight shouldn't play a part!"
I drive her to work the next day to show her off, with no problems. At lunch, she acts like I am out of gas again. The previous owner put an electronic fuel pump towards the back. This guy to be exact: https://www.amazon.com/Mr-Gasket-12...5289-239-3---143-3-0&sr=1-2&ymm=1979:jeep:cj7
As you can see, 50% of folks say it's a hunk of junk. But mine is running... Now, sometimes if I pull the fuel hose off from the filter up in the engine compartment, gas flows out no problem. Other times, no dice. Dry as a bone.
So, after all of that, here is where I am at and my questions that I have. I will be replacing all the fuel lines, filter, and all vacuum lines. My CJ7 is missing the charcoal canister, the thingy that kills the jeep if you flip over (cant think of the name) and anything else that normally sits between the tank and the carb. (Besides pump and fuel filter.) The tank has some dirt at the bottom, the fuel sending unit has some white corrosion stuff on it, so they are being replaced as well.
Fuel pumps... I'm going to replace it. Do you guys recommend the stock mechanical, an electric, or a combination of both? If you recommend electric, how do you incorporate a kill switch?
All the missing fuel system pieces... which ones are important to replace? I can't find charcoal canisters anywhere.
While I am replacing everything listed above (also a new air cleaner & spark plugs) what else would you recommend while I am doing all this work?
I know this is ridiculously long, but I wanted to make sure I gave y'all as much info as possible!
Thanks in advance for you time and attention.
-Boxcarburt; DFW, Texas
I am asking about a 1979 CJ7 AMC 304 .
Several times now, the jeep has started to run very rough after several minutes of driving. Occasionally she will die. When she dies, sometimes she will start right back up and sometimes she will pout for several days.
The first time this happened was 2 hours after buying her. I assumed she was out of gas so I put 5 gallons in from a new 5 gallon red tank. Started right up! I drove to the gas station that's 1/2 mile away to fill her all the way up, and put in $2...
I'm a harley guy. I traded my motorcycle for this because it's much more family friendly. So... I have the inner dialog with myself: "Does it only hold 6 gallons? I guess it could... maybe people mod Jeeps to have small tanks because it mean's less weight so it climbs better..." Then I think: "This 304 should really be able to torque it's way up a wall with a few sumo's sitting in it! The tank weight shouldn't play a part!"
I drive her to work the next day to show her off, with no problems. At lunch, she acts like I am out of gas again. The previous owner put an electronic fuel pump towards the back. This guy to be exact: https://www.amazon.com/Mr-Gasket-12...5289-239-3---143-3-0&sr=1-2&ymm=1979:jeep:cj7
As you can see, 50% of folks say it's a hunk of junk. But mine is running... Now, sometimes if I pull the fuel hose off from the filter up in the engine compartment, gas flows out no problem. Other times, no dice. Dry as a bone.
So, after all of that, here is where I am at and my questions that I have. I will be replacing all the fuel lines, filter, and all vacuum lines. My CJ7 is missing the charcoal canister, the thingy that kills the jeep if you flip over (cant think of the name) and anything else that normally sits between the tank and the carb. (Besides pump and fuel filter.) The tank has some dirt at the bottom, the fuel sending unit has some white corrosion stuff on it, so they are being replaced as well.
Fuel pumps... I'm going to replace it. Do you guys recommend the stock mechanical, an electric, or a combination of both? If you recommend electric, how do you incorporate a kill switch?
All the missing fuel system pieces... which ones are important to replace? I can't find charcoal canisters anywhere.
While I am replacing everything listed above (also a new air cleaner & spark plugs) what else would you recommend while I am doing all this work?
I know this is ridiculously long, but I wanted to make sure I gave y'all as much info as possible!
Thanks in advance for you time and attention.
-Boxcarburt; DFW, Texas
Replacing all the fuel lines isnt a bad idea, especially if old and cracked. I had a similar issue with my 8 years ago, ended up being a pinhole in a section of the hard steel line before the electric fuel pump. Electric pumps like to push fuel but not too fond of sucking it, it doesn't take much to air lock it. The roll over valves are obsolete but when I replaced mine I took it down to Napa and we found a close enough match from a Nissan (sorry, I dont remember which model)
! Mine has an Eddlebrock with an automatic choke. It looks fairly new, but I have no problem rebuilding it as the whole idea behind this repair is to know that then entire fuel system has been corrected. That being said, will I need the choke pull off for an automatic choke carb?
