XFR/Firecat/Sabercat Regular 128" XF / Firecat/Sabercat chassis

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Old 02-21-2005, 08:01 AM   #1
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I need some help diagnosing a problem with a 2005 F6 a friend of mine owns. Ever since he bought the machine, he has had problems with backfiring at certain times and in all different conditions (RPM, speed, temperatures, etc). The problem is intermittent and will come and go. This weekend, while on a trip in northern Wisconsin, as we were trail riding, the sled just quit. In the morning it was backfiring on a lake and then ran fine for a 100 miles when it quit. It had spark and appeared to not be getting fuel. It would not fire at all. Disconnected the fuel line at the rail and there was fuel. Hooked it back up and started right up and ran fine. After another 75 miles or so it backfired again. Sorry for the length, but could use some help if anyone has experienced this issue.
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Old 02-21-2005, 10:45 AM   #2
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sounds like water or ice in the fuel. Try a little isopropyl.
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Old 02-21-2005, 04:55 PM   #3
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We thought it may be the gas, however there were four other sleds using the same gas and we added ISO. Any other ideas?
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Old 02-22-2005, 09:13 AM   #4
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Check the reed petals, spark plugs & air box.
The reed petals may have something hindering their performance that may have come from the air box. Also, is it EFI? If so, check and clean the injectors.
Good luck and keep us posted.
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Old 02-22-2005, 02:15 PM   #5
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O5?...sounds like something a dealer should be figuring out @ no charge!
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Old 02-22-2005, 02:22 PM   #6
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might be electrical too... have your dealer check the kill switch and ignition switch. there are a lot of things it could be... bring it in and have them check it out
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Old 02-22-2005, 02:35 PM   #7
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Thanks for the input. I agree it needs to go to the dealer @ no charge. I'll let you know what they find out.
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Old 02-27-2005, 10:36 AM   #8
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If he has a tether cord, check that,it may only need a small screw put in the plunger to make better contact. or have the voltage reg looked at.
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