The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Truck won't start

**Ironangel** · 10-17-2017, 10:22 AM

Next time you shut down the motor, pull the breather and see if you can see fuel dripping from the primary and/or the secondary booster venturi's. If so, it's probably time for a rebuild and if you havent done so already, get a 1/4" thick base gasket and/or a phenolic plastic spacer under the carb to insulate the carbs fuel bowl. Just the heating of the fuel in the bowl will expand it enough to push fuel past the weak or leaking check valves. The siphoning effect will all but drain the bowls while the fuel drains back down the fuel line as well. Keeping the tank full should help keep fuel from siphoning back down past the pump as well.

10-17-2017, 10:22 AM	#4
Ironangel Senior Member Join Date: Feb 2010 Location: Falls City, Nebraska "100 Miles From Nowhere" Posts: 2,219	Re: Truck won't start - fuel or acc. pump? Next time you shut down the motor, pull the breather and see if you can see fuel dripping from the primary and/or the secondary booster venturi's. If so, it's probably time for a rebuild and if you havent done so already, get a 1/4" thick base gasket and/or a phenolic plastic spacer under the carb to insulate the carbs fuel bowl. Just the heating of the fuel in the bowl will expand it enough to push fuel past the weak or leaking check valves. The siphoning effect will all but drain the bowls while the fuel drains back down the fuel line as well. Keeping the tank full should help keep fuel from siphoning back down past the pump as well. __________________ Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" "Be American, Buy American" Last edited by Ironangel; 10-17-2017 at 10:33 AM.