I think y'all are dodging the actual question. paul is asking which one would be better for pumping feul. I don't think it would really make any difference which pump is used. With the preblem described, i would suspect a flat lobe, worn pump arm, or potentially an internal pump issue, such as a bad seal or ruptured diaphragm. Since you have both styles of pump, it won't hurt to try the vacuum assist style and see if it makes any difference.
edit, if there is no difference, then there is another issue beyond the pump, such as the mentioned cam lobe, but also potentially something restricting the line from the tank.
Last edited by LONGBOX55; 05/29/2010 4:58 AM.
