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MGB '71 MGB fuel pump

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GaryBeu

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So I'm trying to set my carbs and now discover thar my PO installed aftermarket fuel pump is putting out 5.5 PSI. I seem to recall that this is WAY too much. Is there a decent one to by at NAPA or somewhere that won't cost an arm and a leg? Thanks.
 
So I can't find a Facet pump locally. All available is a Delphi that puts out 2.5 to 4.5 psi at "shut off". What does that mean? And will this one work? Thanks.
 
Or put a regulator in - might be easier.
 
Well, we bought a Mr. Gasket fuel pump #42S that puts out 2 - 3.5 psi. Instructions say to mount as low as possible to bottom of fuel tank at a 45 degree angle with inlet down. The line from our fuel tank comes down and line to carbs is lower...we had to mount the pump basically upside down. Car started right up and ran well for about 10 minutes then quit. We are getting no fuel through the pump now. What don't we know and what should we do? We are at a total loss. Is there something inside the tank that helps boost fuel up to that pump inlet line? Thanks.

Gary and Carla
 
I'm going to go out on a limb and say crud in the tank. has the tank been cleaned? is there a filter between the tank and the pump? Is there gas in the tank - (Don't ask me how I know)

you should be able to segment the fuel system - ie.

1. Pump runs but gets no gas - therefore between tank and pump.

2. pump runs and gets gas but no gas to carb - therefore between pump and carb etc.

3. pump doesn't run - therefore fuse or some such electrical.

Take this one piece at a time and it should be easy, but, I'm guessing what is in the tank is the culprit. One check would be to run a line into the pump from a gas can - if it works, you've isolated the area of concern.
 
Well...we have gas in the tank. Pump runs,filter between tank and pump is clear. filter between pump and carbs is clear. No fuel to the pump. We have not drained tank but don't know what could stop fuel. I guess the fuel line from tank to pump could be clogged...make sense?
 
Gary - Two things could cause the problem you are seeing - Clogged line between the tank and the pump or a gigantic air leak between the tank and the pump. JP suggests - "One check would be to run a line into the pump from a gas can - if it works, you've isolated the area of concern." That should be your first check, then go from there.
Cheers,
 
Thanks guys. I'll try the gas can idea first. If we think we have a clog in the line from tank to pump, would we harm anything by blowing compressor air through into the tank? We aren't sure what is on the end of the line inside the tank.
 
shouldn't be a problem - except that you will be blowing the clog back into the tank to re-offend at some other inopportune time. If that is the issue, drain the tank, pull the tank and get it cleaned (and possibly relined). You'll be glad you did.
 
Thanks JP...probably the best idea :frown:
 
Don't look so sad - it's not actually that difficult on the Midget - can't imagine it would be harder on the B
 
Sorry...sometimes I just HAVE to feel sorry for myself! :smile:
 
I suspect you can have it off cleaned and returned in no time.
 
So I was talking about my fuel problem with an old Kentucky farmer yesterday and he said to check the rubber hose in the fuel line from the tank...might have a hole in it. We checked and, sure enough, it had a hole. Replaced the short rubber hose and she started right up! These old farmers are pretty smart.
 
David suggested just that. Suckin' air:
David DuBois said:
...air leak between the tank and the pump.
Click to expand...

Glad ya sorted it.
 
Had pretty much the same thing happen in the wifes car. We were out one day last summer and the car started to sputter and die. After setting for a few seconds, it started up and ran for a couple minutes and quit again. Fortunately we were very close to home and we made it back before it quit again. After checking out the problem I found that the braided suction hose from the tank to the pump was cracked. I couldn't understand why it did this, as the whole fuel system was new, including the pump and all the lines, I thought! The suction line was supposed to be ordered and to get it running I used the old line TEMPORARILY! As you can figure out, I forgot to order the new line and the old one got forgotten.
Now you can understand why pilots use a check list. No parking places up there! :jester:
 
Doc...sometimes I readd too fast or not completely :frown: I guess. I somehow missed the comment from Dave. I'll try to pay more attention and save myself some time!

Paul...and I'm a pilot, too! I need a better checklist.
 
mehheh.

Some days are better'n others. :wink:
 
That's a sure thing. All you guys here on the BCF are AT LEAST as smart as the old farmers!! Absolutely NO CUT intended of course...only a compliment and a hearty THANK YOU!!
 
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