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Gm LP engine missing and large backfire on startup if fuel tank not shut off

Just started missing bad and will backfire on restart if lp tank valve not shut off.
Thinking a diaphram in the fuel system is leaking fuel into motor when shut off.
Don't know lp systems at all. Any help would be great.
  • Posted 25 Apr 2016 02:41
  • By bing
  • joined 8 Mar'09 - 5 messages
  • Minnesota, United States
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Had a forklift mechanic do a tuneup, plugs, wires ,cap.,rotor. Also set timing. Now runs well.
  • Posted 28 Apr 2016 12:32
  • By bing
  • joined 8 Mar'09 - 5 messages
  • Minnesota, United States
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Did you figure this out?
  • Posted 27 Apr 2016 03:43
  • By bbforks
  • joined 1 Mar'12 - 1,437 messages
  • Pennsylvania, United States
bbforks (at) Hotmail (dot) com
Customers love technology- until they have to pay to fix it!
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Fact of the week
In Germany, the 9th of November is sometimes called Schicksalstag, the "Day of Fate" because it has been the day for several major historical events, including the horrors of Kristallnacht in 1938 and the fall of the Berlin Wall in 1989.