texasmike
Full Access Member
- Joined
- Sep 18, 2018
- Posts
- 247
- Reaction score
- 175
- Location
- Conroe Texas
- First Name
- Mike
- Truck Year
- 1984
- Truck Model
- C10
- Engine Size
- 305
Some of you will think I'm just anal but being retired, with ample time on my hands, I just want everything operating the way it was designed to, or better.
So here's the latest: I've recently noticed that after running an errand, when I return to the truck and start it, I see a puff of black smoke at the exhaust pipe. After revving it two or three times, it clears up and doesn't happen again until the next time I shut it off and restart it. It always starts quick, idles smooth and runs great. When I open up the secondaries, no smoke of any kind is noticed. The air/fuel screws are adjusted to max manifold pressure (19.5") and are about 3/4 turns out. After the truck sits for an extended length of time, like overnight, there is no smoke on startup. Could the carburetor be dumping fuel into the manifold when I shut it down but after sitting long enough, the fuel has time to vaporize and evaporate so no smoke on startup. Any ideas out there on what may be causing this?
The truck gets a LOT of attention in parking lots and I would rather not have the black cloud around it when I leave. Is that being too self conscious or anal?
So here's the latest: I've recently noticed that after running an errand, when I return to the truck and start it, I see a puff of black smoke at the exhaust pipe. After revving it two or three times, it clears up and doesn't happen again until the next time I shut it off and restart it. It always starts quick, idles smooth and runs great. When I open up the secondaries, no smoke of any kind is noticed. The air/fuel screws are adjusted to max manifold pressure (19.5") and are about 3/4 turns out. After the truck sits for an extended length of time, like overnight, there is no smoke on startup. Could the carburetor be dumping fuel into the manifold when I shut it down but after sitting long enough, the fuel has time to vaporize and evaporate so no smoke on startup. Any ideas out there on what may be causing this?
The truck gets a LOT of attention in parking lots and I would rather not have the black cloud around it when I leave. Is that being too self conscious or anal?
