No start!!

[Whistley]

so, been driving the Jimmy all week with no issue. Finally Got it on a back road where I can open it up a little. Punched the gas and as soon as the four barrel opened up it stalled. It sputtered a bit and sounded like it tried to start firing again as I was rolling still but it did not start . 24 hours later and it still won’t start. Any ideas of where to start. Engine is a 400 with a Quadra jet carburetor. Fuel pump and distributor are fairly new. They were both installed before I purchased the Jimmy though.

 

[mechted]

Sounds like either a fuel issue or a spark issue.
Check for fuel by manually opening the throttle at the carb, you should be able to see 2 jets of fuel get squirted into the primary (front) fuel bowls as you move the throttle blades to the open position. May require a flashlight to see, and you have to be looking down into the bowls from directly above.
Check to see if you have spark by removing a spark plug, ground out the base, reattach the wire from the distributor and have someone else bump the starter.

 

[Bent77]

Float may be stuck open, so when you crank it, it floods.

Pull the air cleaner off and have someone crank it while you look as @mechted said

 

[Justin V]

If it is flooding, change your oil...

 

[Truckman4life]

If the float is stuck. Gently tap on the front of the carb at the top with a hammer and it should pop loose. I had an '82 chevy 3/4 ton in highschool and the float would stick going down the highway and then when I came to a stop sign it would die. I carried a ball peen hammer on the seat and would hop out and pull the air cleaner and smack the carb a few times and fire it back up and go.

 

[urbex]

Just went through this with my '86. It would randomly stall, but always immediately fired right back up. Finally died turning a corner the other day, had to get it towed home, and wouldn't even so much as sputter on restart 24 hours later. 3 month old Accel distributor installed by PO. Power/ground to distributor, coil, ignition module, pickup coil all tested good, still no spark. Near as I can tell, something in the magnetic portion of the pickup went belly up, and it fired right up after dropping in a new distributor. Was going to get it on the lathe this weekend to bench test it to verify what actually failed.