1991TealRSZZ4

My car is powered by a ZZ4 crate engine. I am running an edelbrock 750cfm vacuum secondary carb.
Last weekend I drove to Savannah and back, car was running fine. It pulled good, and didn't have any problems. It sat through a bad storm the next day. Two days later I started the car up, and it sounded a little rough. I let it warm up and drove it down the road. It was hesitating really bad, and bogged down and backfired slightly when I got on it. It doesn't want to idle, and will cut off or idle at a really low rpm (300-400) if I give it gas and let off.
I am ruling out bad gas because I filled up in savannah and drove 170 miles home on the same tank I am on right now, and it drove fine. I pulled the distributor cap and inspected for any water or corrosion, everything checked out ok. I thoroughly inspected all of the spark plug wires and boots, they look ok. I started the car at night and didn't see any arcing from the wires. I pulled all of the plugs and they all looked good.
Does anyone have any ideas on what could've happened, or what is causing my problem? Thanks in advance.

1991TealRSZZ4

ttt

AJ_92RS

Unless you have a Q-jet replacement Edelbrock, or the new AVS series, it's not a vacuum secondary. What model number is it?

Sounds like fuel starvation. Either check the float levels or the float valves to make sure they're working OK.

Do you have a fuel pressure guage? It also sounds like it could be either a fuel filter of fuel pump problem.