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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Dec 2010 Posts: 35 New Guy | | New Guy Joined: Dec 2010 Posts: 35 | Just bought a 1937 pick-up. Started and ran when coming off the trailer, then died and won't restart. I got rid of a tankful of old gas, been sitting for a year. I have spark and gas flow to the carb, but it won't start and keeps backfiring in the carb. I have tried changing the timing, but that doesn't make sense because it was just running. Any suggestions? | | | | | Joined: Feb 2004 Posts: 29,799 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,799 | I got rid of a tankful of old gas, been sitting for a year. It's pretty common for old gas to cause valves to stick in the guides. Pull the valve cover and crank the engine, and see if you've got some valves that aren't moving right. A compression test could also help spot a cylinder or two with sticky valves. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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| | | | | Joined: Dec 2010 Posts: 291 Shop Shark | | Shop Shark Joined: Dec 2010 Posts: 291 | What carb are you running. Some times the float will stick from old fuel and not let any into the carb | | | | | Joined: Aug 2005 Posts: 6,377 Ex Hall Monitor | | Ex Hall Monitor Joined: Aug 2005 Posts: 6,377 | Agree with Jerry, sounds like sticking valve(s).
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| | | | | Joined: Dec 2010 Posts: 35 New Guy | | New Guy Joined: Dec 2010 Posts: 35 | Thanks guys. I'll look at the valves. I checked the carb and the float & needle are not stuck. | | | | | Joined: Dec 2010 Posts: 35 New Guy | | New Guy Joined: Dec 2010 Posts: 35 | Well, timing is right on, valves aren't sticking, replaced points & condensor, now going to replace plugs (look nasty from too much idling)and coil (mechanic friend says spark from coil wire should be blue when held against ground, kind of orange color spark now). All electrical and timing seems to be OK but still won't fire and pops back thru carb. I'll let you know what happens with new coil and plugs. | | |
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