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I put a rebuilt carb on, plus re-mfg fuel pump .I have a fuel filter B4 the fuel pump. Hasn’t run for a while .I have a temp. line going to 2 gal. gas can Put gas in carb. manually . It wants to start and turns over fast enough to barely run then dies. When unhooking the gas line going to the carb , no gas is coming out when cranking. there is gas in the filter,..the pump is sucking but seemingly not pumping. Any ideras’s. thanks jg
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That fuel pump could be a dud. I’d be inclined to think that the diaphragm is bad or dry rotted. A remanufactured anything for a 1954 engine has probably, by now, qualified as old in its own right. I’d verify that the line between pump and carb was clean enough to flow fuel. Just a side thought…How’s the compression on that 60 year old?
+1 on the new fuel pump possibly being bad. However, it is important that the pump is being activated by the cam. If memory serves on some of those theres a rod that needs to come into contact with the fuel pump arm in order for it to operate properly. If that rod fell down into the block then the fuel pump will never work. I think the trick is to hold it in place with some grease when you install the fuel pump. All of this is pure speculation of course, because I don’t remember what style of fuel pump drive that engine has. If nothing else I think it’s worth a look.
Good luck and keep us posted.
Thanks to all for the imput. The pump did pick the gas up and to the carb. Just didn’t have the fuel hose in the can just right. However , after removing the top of carb,BC Rochester single barrel, I checked the floast level it was good. The pump inside was free and working . I removed the rocker cover and all the valves are working (Hydralic) lifters .m, All was oiling real good. No sludge build up.Spark plugs are new and there is spark from wire to plug. It seems to want to run better with the excellerator wide open but will barely run and stop sometimes backfire thru carb.Also the vacuum advance is also working . Rotor not broken, points look good however I haven’t checked the point gap. The last time it ran 3 years ago it ran good . Didn’t touch any adjustments , just removed old gas line and installed fuel filter before fuel pump.Without a timing light I can only check the point gap. After that I am at a loss. As I mentioned before the carb was rebuilt in Canada .
Maybe in three years of sitting some helpful soul pulled a couple of spark plugs wires and put them back in the wrong place.
Oooooh I just remembered something. There used to be a chemical something in motor oils called ZDDP. ( I think the long name was zinc dialkyl dithio phosphate. I just don’t remember for sure.) Anyway, it was an additive designed to fight wear caused by extreme pressures between the contact area of the cam lobes and the lifters. Nowadays, it’s been removed from oil altogether because it can kill catalytic converters. If that truck was running long enough three years ago on oil without ZDDP, you might have had a cam lobe flattened out and that can cause a backfire through the carburetor. In particular, it would be an exhaust valve not opening to cause a backfire.
Don’t get me wrong, I support setting the point gap and getting the timing set correctly first. But do keep this info in mind so you can keep your cam & lifters in shape anyway.
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