I have a two barrell Holley and the accelerator pump isn't working. You step on the gas and no gas squirts form the nozzles. I tried replacing the pump diaphragm but no luck. I also checked the linkage and the lever is moving I'm just not getting any gas coming out the nozzles. I also checked to see if the nozzle block is plugged and its clear. Please help me.
sounds like you've check the good stuff, i'm just going to guess[img]/wwwthreads_images/icons/smile.gif[/img]
how about your fuel level? maybe there ain't enough gas in the bowl for the pump to squirt.
also can you hear it pushing air when you run the throttle which moves the accelerator pump lever?
did you just change anything, fuel pressure regulator or pump etc....?