Re: 1937 Packard 12 still not running right

Posted by Marty or Marston On 2015/10/18 15:05:44

I remember when I had to replace the fuel pump on a '49 Chevy about 50 years go. I bought a new and installed it. Everything seemed OK except when I would get going about 50 mph it would be fuel starved. The condition started occurring at lower speeds. I then replace the pump with another new and the condition was fixed.

I think if I were try to fix the problem I would; 1) disconnect the fuel lines from the pumps & carburetor, 2) fill them with carburetor cleaner & let sit for and hours so hen flush with solvent, 3) replace any filters with new ones, 4) reconnect all of the lines except at the carburetor, 5) turn on electric pump long enough to fill and purge the lines, 6) connect a pressure gauge & measure just before the carburetor to ensure that you at least 3 psi, and 7) measure the volume pumped (refer to specs for the electric pump). If all is well then the last links in question would be the carburetor or a breakdown in the spark side of the issue.

Several notes about electric pumps; 1) place close to the tank as they are designed to push not suck, 2) ensure they have a great ground, 3) place a large filter between tank and pump, & 4) don't skimp on wire size use at least 10 gauge.

Good luck on solving it.