Discussion:
GM 4.3 back fire

truck starts but back firing very hard. any idea what is most probable cause?
  • Posted 24 Apr 2024 03:21
  • By hellokitty
  • joined 11 Mar'09 - 86 messages
  • Ontario, Canada
echo3618@hotmail.com
Showing items 1 - 3 of 3 results.
Is this LPG? Does the backfire happen under load? If LPG and using Asian model C regulator vaporizer check the filter in the regulator vaporizer.
  • Posted 24 Apr 2024 05:11
  • By Drlifttruck
  • joined 20 Nov'05 - 106 messages
  • Texas, United States
Lift Trucks all the same, just painted different colors.
Doc
Email: kulsh@forkliftservice.net
Replaced the plugs, leads, distributor cap and rotor arm, the plugs. start engine still back fire.
  • Posted 24 Apr 2024 05:00
  • By hellokitty
  • joined 11 Mar'09 - 86 messages
  • Ontario, Canada
echo3618@hotmail.com
Id start by replacing the plugs, leads, distributor cap and rotor arm, the plugs are dificult to get to so they rarely get changed
  • Posted 24 Apr 2024 03:25
  • By andrew_k
  • joined 17 Mar'07 - 329 messages
  • England, United Kingdom

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Global Industry News
edition #1247 - 11 September 2025
In what may prove to be a sign of things to come, Canadian materials handling equipment lithium-ion battery manufacturer, UgoWork, has announced battery assembly for some forklifts bound for the North American domestic market will now be done in the US. See the story for full details... Continue reading
Fact of the week
At the opening ceremony of the Sydney Harbour Bridge in 1932, marching bands were instructed to walk out of step as they crossed the bridge. This unusual directive was given as a precaution due to concerns about the bridge's structural integrity during its early use.