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Joined: Apr 2007
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Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Apr 2007
Posts: 59 |
I have a problem with my 51. It would not start unless fed gas directly into the carb. Installed a new NAPA fuel pump and still no good. Pump was removed and bench tested sucsessfully. Tank was pressurized with line cracked and we got a steady stream. Line from pump to filter was removed and it is open. Pump does not seam to be pumping when installed. Am I missing something? Could my cam have gone suddenly bad? Car ran great until this spring.
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Joined: Dec 2009
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ChatMaster - 1,000
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ChatMaster - 1,000
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I have a problem with my 51. It would not start unless fed gas directly into the carb. Installed a new NAPA fuel pump and still no good. Pump was removed and bench tested sucsessfully. Tank was pressurized with line cracked and we got a steady stream. Line from pump to filter was removed and it is open. Pump does not seam to be pumping when installed. Am I missing something? Could my cam have gone suddenly bad? Car ran great until this spring. I have had that trouble in the past, sometimes you have to prime the pump..Also check it your gas cap/tank is vented. GOOD LUCK>>>>ED
Last edited by ED1938; 09/22/12 06:09 PM.
I was only wrong one time in my life so far. But that time I was right, and only thought I was wrong....ED
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Joined: Nov 2002
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Check to be sure the arm is making contact with the cam.
Steve D
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Joined: Apr 2008
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Have you ever cleaned the tank? I'd be suspicious of the problem being inside the gas tank.
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Joined: Apr 2007
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Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Apr 2007
Posts: 59 |
When I pressurized the tank and got good flow at the pump, wouldn't that eliminate a clogged pickup? Also, I had the fuel cap off, so venting shouldn't be an issue. I will try priming the outlet side of the pump, and make sure there are no leaks in my connections. As for the arm making contact, is it possible to install pump with the arm over the lobe?
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It is possible to install the arm over instead of under the cam. The lobe must push the arm down. You can damage the arm and possibly the cam. Pull the pump off, prime it then connect the line from the tank and actuate the lever . If it pumps you know the pump is good. If not, replace the pump.
Rick
"Never time to do it right the first time, but always time to do it over."
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Joined: Apr 2008
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Pressurizing the tank is different than the pump drawing the fuel from the tank. I ran into this on my '50 when I got it going after many years of sitting in a shed. I could pressurize the tank and get fuel to flow out of the line also. I was amazed when I dropped the tank and took out the sender. It was full of mud/rust varnish. I ended up putting a new tank.
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Joined: Apr 2007
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Shade Tree Mechanic
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OP
Shade Tree Mechanic
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Thanks for all the help! Lots of good ideas. I'll giver 'er another try this week.
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Joined: Feb 2002
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It is also possible that the NEW pump is not working. On a recent trip a friends brand new fuel pump on his rebuilt 216 died after 60 miles. 
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Have you checked the pump with a vacumn gauge, if you have 10 inchs at cranking it should be ok, also check the pressure side. You could also put a hose in a gas can and hook to the pump and see if it will run on that, a good pump should not need to be primed.
Dens Chevys 1927 Speedster 1928 coupe 1941street rod 1947Fleetline 4 door 1949 1/2 ton Pickup (sold) 1954 210 4 door 1972 Monte Carlo 2003 Corvette convt..
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See if gas will go through the filter.
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