posted June 13, 2003 07:22 AM
I would look at...
1. The pump cavity at the bottom of the fuel bowl. If you have the check-ball-and-strap type of check valve, make sure the ball isn't 'frozen' to the seat. If it is, use something small, like a toothpick, to carefully 'unfreeze' it, then use a little carburetor cleaner on a Q-tip to clean the ball and seat as best you can (I wouldn't use compressed air). If you have the red-rubber-umbrella type of check valve, make sure that the umbrella part is located in the pump cavity and not in the fuel bowl proper, i.e., that it hasn't been installed backwards. Don't laugh- I've seen this more than once.
2. Make sure that the pump passage in the metering block, leading from the pump cavity to the pump nozzle, is free and clear. Compressed air works well here.
3. Make sure that the pump check needle, located under the pump nozzle, isn't stuck to it's seat.
4. Check to see that the holes in the pump nozzle are clear, too.
5. If you're using a spring on top of the pump check needle to try to 'cure' the pullover problem, get rid of it. Any spring strong enough to affect the pullover deal will also lock up the whole pump mechanism.
Let us know if the above doesn't work
Earl Parker II