Vapor lock / hard restart

66plysat said:

I thought I had a vapor lock issue for a while, I installed insulation around the fuel lines and installed a insulator plate under my carb. Nothing seemed to help then my engine builder called me and told me he figured out the problem. The fuel pump push rod on my new fuel pump was a new style, it was hollow with end caps that would fall off the push rod. He went on to explain the push rods used to be solid metal, but apparently the manufacturer switched to hollow push rods with end caps, the end caps had a tendency to fall off the push rod. He discovered this issue with a Road Runner that was having vapor lock like issues similar to me. Since he discovered the issue, he replaces the hollow push rods with old remilled solid metal push rods, no more vapor lock type issues.

Click to expand...

turbine68rt said:

Comp, Howards, and ARP for example all make hollow fuel pump pushrods for lighter weight. The tips are pressed in. With constant pressure on both the cam end and pump arm end I wouldn't know how they would have the chance to completely detach.

Click to expand...