Slant Six Tuning/Running Issues

What am I looking for here? The cap fits well and the hold downs are tight. Would pictures of the cap and rotor help with anything?



Tank is new, All lines are new (hard and soft), and a new quality filter. The pump is the only thing in the system prior to the carb being reused. It was flushed before hooking up the the carb.

Just spitballing here. Could be that the rotor is loose? idk.