The truck starts fine. It runs great until engine warms up to normal operating temperature. At that time it starts to stumble/hesitate at cruise, and when trying to accelerate with light throttle pedal. If you engage the vacuum secondary, i.e. full throttle, it pulls strong. There is something in the primary side of this carb. that isn't right. I have rebuilt the carb, everything cleaned up nice, replaced needle and seat from kit, all o-rings and gaskets provided in the kit, but still has cruise speed issue once it warms up. Any ideas?
This is the stock 2 bbl. nikki carb. with no modifications to emissions.
This is the stock 2 bbl. nikki carb. with no modifications to emissions.