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Fuel Pump ?

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A

aroostok

Jedi Hopeful
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Recently replaced fuel tank. Got connections correct on pump but still get no gas to carbs. I suspect pump is bad. Could blowing back through lines with air line (90 psi)when blocked while still connected to pump have caused the diaphragm to go? I get nothing out of the pump at all. It is aftermarket replacement and runs all the time (I think they call it a legacy pump though shaped like the SU and fits into the rear compartment on a 76B.
 
Are you sure you are not pumping the wrong way? I did that on my Jag once.
 
Vince asks a good question. If the pump you are using is an all plastic pump that looks like a SU fuel pump, it should not run continuously. Check that the inlet ond outlet lines are connected to the correct ports (if the pump is all plastic, be careful that you don't overtighten the fittings or you will crack the case - the big drawback to the all plastic pumps). Insure that you have the proper gaskets in place and the banjo fitting oriented correctly (resised side facing the bolt, flas side to the pump). Also check for any air leaks between the tank and the pump. Finally, and not to insult your inteligence, make sure that you aren't out of fuel in the tank.
Cheers,
 
...and David brings up many good points. I have had these happen on many occasions. And small leak along the way will cause it to run and could be dangerous. Surprising how fuel evaporates and next thing you know the pump runs on & on and you are out of gas.
 
Thanks much guys. I'll do some serious checking on this tomorrow, especially the banjo bolts. Didn't know there was such a problem. Recent pump I saw had plastic fittings in place of the banjo bolts. Any value to them or should I use the banjo bolts.
 
*snork*

S'okoay Dave. Tho I was tryin' t' figger what special banjo fitting had some odd side to it. /bcforum/images/%%GRAEMLIN_URL%%/wink.gif

I am REALLY leary of the plastic body pumps. Too much can go on where it can't be seen until it's all over. I'd change it as soon as possible to a metal one. Just my paranoia showin'.
 
Dr. - Not paranoia. I'v had several of the plastic pumps (made in New Zealand) cycle through my ownership and everyone of them have ended up leaking. Mostly they develop cracks around hte inlet/outlet ports, but one hod a bad seam where the bottome og the pump was fitted. It is really a shame, because other than the leaks, they are a good pump.
Cheers,
 
I ran across one of those plastic pumps that the diaphragm had cracked, and was not drawing the fuel from the pump. A quick test is to get one of those box pumps (I hate those things) but that should get you going until you can get a proper SU pump. Sorry, I started drifting off there...
 
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