Fuel Pump Thoughts.

I'm not sure if my old dauntless fuel pump is trashed or not. I haven't had time to investigate it yet. I'm sure the fuel filters are both full of trash and may be my problem. Again I have not had time to investigate the cause of my problem.

Another member here actually sparked an idea in my head. I think it maybe went over the top of my head when I read it though. Obviously I need to trouble shoot my problem first but I'm pretty sure the filters are definitely a problem and if after replacement of both of them problems still exist I will blame the old crusty line as well as the pump in order of testing procedures. Not what I need advice on though at this point.

So it was brought up to add an electric pump into the system even if it might only be used for priming the float bowl. Yes my project has made it maybe a mile away from home total distance on several trips in the past year. I've never been accused of driving this jeep. But thinking this over last time I moved it I had a pretty rough time getting the carb filled with fuel. Lots of cranking etc.

I'm pondering the idea of using an electric pump for priming and maybe even a back up. Being stranded scares me like some people have a phobia of snakes or spiders and good friends are in very short supply. Chances are if my fuel pump stops working it will be on the one time I am somewhere alone.

So my question is would it be possible to plumb in an electric pump inline of the current fuel system? Would an electric pump free flow enough without power that the factory style mechanical pump could pump through it? I would also be curious as to how much pressure the rochester 2g could handle. I would like to avoid adding a regulator if possible.

Then I guess my next question would an electric pump push the correct volume of fuel through a mechanical pump if it failed to the point it couldn't produce the volume required to keep the motor running?

Definitely a lot of what ifs etc but sometimes my mind gets busy and I know there are people out there that may have tried the same thing that I'm thinking about. Also I would be interested in hearing about what fuel pumps are recommended for both mechanical and electric. Seems like most modern products are junk. Thank you in advance for any replies.

 

So then I wouldn't be trying to think up new complexities and complications like redundant electric pumps. Each new item adds potential failure points and exponentially multiplies the possibilities for confusion.

A simple normal OEM type mechanical fuel pump can potentially last a lifetime with no attention or problems whatsoever.

 

So a couple years ago my '34 Ford died about 100 miles from home, on a weekend when everything was closed.

As a result, I met several wonderful people, and in the end one of them trailered me home, and I slept in my own bed that night. Now I never travel that road without warm memories and an attitude of gratitude. Why deny yourself those types of experience?

Embracing our fears leads us to our greatest opportunities for growth.

 

First off, I must say that I have a Dauntless, a later-model fuel pump with a return line fitting, a regulator, return lines plumbed in to both tanks, and a fuel pressure sending unit that resides just before the carb.

When I rebuilt my fuel system recently, I threw a cheapo electric pump inline. The mechanical pump pulls furl through it just fine. I have noticed a 1-2PSI drop in fuel pressure, although this is likely due to the addition of a return line. (return fitting was plugged before)

Not an exact answer, but my mechanical pump usually runs at 4-5 PSI, my electric pump will run the same while priming with the engine off, and the electric pump bumps the pressure by 1-2PSI while the engine is running. So I would assume it will work, unless there is a catastrophic failure inside of the mechanical pump.

I used a cheap Summit Racing pump. I don't know how long it will last, which is why mounted it in an easily accessible place and bought a spare (~$80). As of now, it works very well.

As you yourself and Pete said, work through the fuel lines and filters before you go buy anything. Don't ask me how I learned that. My $500-poorer bank account and I don't want to talk about it.

 

I like to think about things. Also just curious if it was possible. This project has been on my mind a lot lately. Probably because I haven't had time to spend on it then on the days I have had time it's been so hot I walk past it when I come home from work thinking I should be doing something.

 

There is no reason to add an electric fuel pump to the system. A properly working fuel pump with sound fuel lines will easily supply the fuel system in a reasonable amount of time.
If the jeep has been sitting long enough to loose fuel prime, then cranking it over for an additional 10 seconds is actually beneficial as it allows the oil pump to lubricate the system before starting.
KISS

 

Excellent point!

 

I inherited a jeep with a "creative" fuel system. Took a long time to solve the vapor lock, over pressure and rich condition. Going back to stock with the exception of a fuel pressure regulator and pressure sender solved everything. The only reason I used a regulator is I found that current day mechanical pumps are low quality and the one I bought was over pressure. You want 3-5 lb.

I kept the electric pump the PO mounted to the frame just as a backup but it's just capped off and has a switch in the cab to power it. I carry some fuel line in my tool box so I figure in a pinch, it may come in handy. I can also use it to siphon fuel.

 

Well I guess that's that. I leave it original as it came to me.