Discussion:
misfire, backfire, then dies

This morning one of our forklifts wouldnt idle, it would misfire when starting for a few seconds then die. When trying to press the accel. pedal it would immediately backfire and die. After looking at it i noticed that when removing 1 plug wire from its sparkplug it would start right up. so i replaced the spark plug. when i start it with the spark plug wire disconnected it runs fine as soon as i connect the wire to the plug it misfires and dies. any idea?
Update:
When i remove the 2nd cyl spark plug wire from the cylinder it runs fine as soon as i slide the wire down the sleeve before i get to the plug it revs up and dies.
Is this a possible exhaust valve problem.
  • Posted 31 Jul 2020 01:33
  • Modified 31 Jul 2020 02:52 by poster
  • By rclfmaint
  • joined 12 Jun'20 - 10 messages
  • Virginia, United States

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SMV (Konecranes) 4632CC5
Balling, Denmark
New - Sale
Airman ENCL045
Yokohama, Japan
Used - Sale
Upcoming industry events …
May 20-22, 2026 - Jakarta, Indonesia
June 18, 2026 - Nottinghamshire, United Kingdom
November 3-5, 2026 - Jaarbeurs, Netherlands
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Movers & Shakers
Nils Altrogge Nils Altrogge
Vice president sales & business development, Heli Europe
Zone sales director – north, Maxam Tire
Director of inside sales, Cisco-Eagle
Vice president of sales, Stow Group