Backfoot100
Full Access Member
- Joined
- Aug 18, 2017
- Posts
- 374
- Reaction score
- 644
- Location
- Florida
- First Name
- Eddie
- Truck Year
- 1986
- Truck Model
- C1500 Suburban
- Engine Size
- Carbed 350
Accelerator pump adjustment would be my first look.
The pump arm is attached to the throttle shaft. The slightest movement of the throttle should shoot some gas through the pump nozzles in the throat of the carb.
The arm of the pump should not have any slack in it. It needs to be just snug against the pump diaphragm. Its adjusted with a small nut on the pump arm. That usually takes care of it.
Also the proper timing does indeed make a difference.
Glad to hear you're making progress anyway. May even make you a Holley lover yet..LOL.
The pump arm is attached to the throttle shaft. The slightest movement of the throttle should shoot some gas through the pump nozzles in the throat of the carb.
The arm of the pump should not have any slack in it. It needs to be just snug against the pump diaphragm. Its adjusted with a small nut on the pump arm. That usually takes care of it.
Also the proper timing does indeed make a difference.
Glad to hear you're making progress anyway. May even make you a Holley lover yet..LOL.
Dialed it back to 10 and took it for a spin. Does a slight backfire still if you get on it hard about 1/4 the time. Otherwise, its smooth and has decent acceleration, so still better than it was. The accelerator pump looks to be set and working pretty good, however I suspect I may have a slight vac leak somewhere. My idle is still a tad high and if I spray carb cleaner on the sides of the back section, the idle will fluctuate. Might be in the intake or at the base plate too - dunno. This motor only has 100k on it but was so cobbled when the PO pulled the Q-Jet and vac lines all off its a mess how anything is hooked up.
