84 dodge w250 yard plow truck. Came with a 2 bbl Holley, replaced it with a (don't laugh) "Dromedary" Chinese Carter knock-off.
Has an automatic choke, which works well enough, and it holds a high idle. The issue is when the truck warms up enough, it won't hold a consistent idle. Just cranking up the stop screw isn't a cure, as I have to have it at 1500+ RPM to power through the "low spots."
Set, by ear, to a reasonable, or somewhat-above-reasonable idle, it gets into a funk where it idles slower and slower and just peters out. A stab at the gas pedal, hard enough to trigger the accellerator pump, brings it back. Fuel is managed pretty well, using sta-bil, winter RVP gas, and rotating new for old. It makes good power when plowing.
Thinking I had a bad fuel pump, I wired up an electric one, no difference. When I unplug the electric pump, to "run it dry" for summer storage, it stalls out in about three seconds. This is counter to my small OPE which will idle on what's in the carburetor's bowl for 20-30 seconds.
Anyone else with such a set up care to comment? Seems like my float bowl is nearly dry and could use some more fuel. There is also the possibility that it's anything else, like a vacuum leak, etc. The thing's not on the road so I really only need PCV and the brake booster, maybe I'll tackle that angle and plug off the rest of the hoses.
Has an automatic choke, which works well enough, and it holds a high idle. The issue is when the truck warms up enough, it won't hold a consistent idle. Just cranking up the stop screw isn't a cure, as I have to have it at 1500+ RPM to power through the "low spots."
Set, by ear, to a reasonable, or somewhat-above-reasonable idle, it gets into a funk where it idles slower and slower and just peters out. A stab at the gas pedal, hard enough to trigger the accellerator pump, brings it back. Fuel is managed pretty well, using sta-bil, winter RVP gas, and rotating new for old. It makes good power when plowing.
Thinking I had a bad fuel pump, I wired up an electric one, no difference. When I unplug the electric pump, to "run it dry" for summer storage, it stalls out in about three seconds. This is counter to my small OPE which will idle on what's in the carburetor's bowl for 20-30 seconds.
Anyone else with such a set up care to comment? Seems like my float bowl is nearly dry and could use some more fuel. There is also the possibility that it's anything else, like a vacuum leak, etc. The thing's not on the road so I really only need PCV and the brake booster, maybe I'll tackle that angle and plug off the rest of the hoses.