rebuilding a quadrajet

[swervin ervin]

Originally posted by vmax
ok i have the carb. taken apart and i dont see the small ball
below the accelerator pump. with this ball missing will this cause the fuel not to come into the carb.?

No. The check ball is there to keep air from entering the pump well on the up stroke. When the pump goes down on the power stroke, so to speak, it pushes the check ball off it's seat to let the fuel go on out the pump jets. Once the pump starts back up, the ball will cover the hole up again, and it starts all over again. The only reason for the check ball is to keep air from coming in. There is a channel past the pump jets which is vented to the air horn. If this ball is missing, it will cause a bit of a lag the next time the pump is used, because of the air being sucked in.

In short, put the ball in when you rebuild it. It looks like someone has already had it apart and left it out. I bet it never did perform right after this either.