Broton2
Junior Member
- Joined
- Apr 2, 2025
- Posts
- 3
- Reaction score
- 0
- Location
- San Clemente
- First Name
- Ryder
- Truck Year
- 1976
- Truck Model
- K20
- Engine Size
- 400
I’m having some interesting issues with my 76 K20, it’s got a new distributor, plugs, wires, and fuel pump. It starts to backfire out the top of the carb as soon as it goes to engage the secondaries, a very rapid popping. It idles and runs great but as soon as the secondaries go to kick in it pops like you wouldn’t believe. It’s got the OG quadrajet that I rebuilt after I had this issue with no change. I just timed it and have been stumped on it for a couple days now.