2002 500i Auto 4x4 Sputtering, Backfiring, Stalling, and No Power - ArcticChat.com - Arctic Cat Forum
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post #1 of 7 Old 05-25-2019, 02:06 PM Thread Starter
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2002 500i Auto 4x4 Sputtering, Backfiring, Stalling, and No Power

So it was a long, heavy winter, and the trails just opened up. (ATV was used over the winter for ice fishing and minor plowing.)

Headed out today, and after about 20 miles the ATV suddenly started losing power and backfiring. It started getting worse and more frequent; I had to use low gear to get up a hill, and any time I open it to full throttle it falls on it's face. Running flat it was doing ok, (was able to do 30 up the road as opposed to the usual 45).

I'm not even sure where to begin. I just got home, (had brother pick me up) and the soon as it cools I'll pull the spark plug. The carb was rebuilt/cleaned last summer, as well as new fuel lines and a new petcock. It has a 1 yer old battery, connections are all tight, grounds are tight.


02 Arctic Cat 500i Automatic 4x4
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post #2 of 7 Old 05-25-2019, 08:17 PM
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Check the voltage readings at idle and at higher RPMís. Check with lights on then lights off. Sounds like voltage regulator failure.

Current Sled rides
2005 Sabercat 600 EFI LX
2006 T660 Turbo Touring
2016 Bearcat 2000XT

Past Sled rides
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1980 El Tigre 6000

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2005 A/C 300 manual 4x4
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2003 A/C 400 auto 4x4 FIS
RTR Steerlites & Shock Bushings
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post #3 of 7 Old 05-26-2019, 09:09 AM Thread Starter
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Originally Posted by 660catman View Post
Check the voltage readings at idle and at higher RPMís. Check with lights on then lights off. Sounds like voltage regulator failure.
Im assuming you just check off the battery?

Plug was in great shape btw.

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post #4 of 7 Old 05-26-2019, 09:23 AM Thread Starter
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post #5 of 7 Old 05-26-2019, 09:39 AM
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ATV: 03 400 4x4 auto FIS, 05 300 4x4
2002 500i Auto 4x4 Sputtering, Backfiring, Stalling, and No Power

Yes off the battery. Regulator should maintain voltage in the 14 range. Get your battery load tested to make sure that is 100% first but to me itís the regulator.

Current Sled rides
2005 Sabercat 600 EFI LX
2006 T660 Turbo Touring
2016 Bearcat 2000XT

Past Sled rides
1993 Pantera 550 EFI
1980 El Tigre 6000

Current ATV rides
2005 A/C 300 manual 4x4
RTR Bushings & shock bushings
Motobatt Battery


2003 A/C 400 auto 4x4 FIS
RTR Steerlites & Shock Bushings
Motobatt Battery
26" Kenda Bearclaw HTR's


Past ATV rides
2003 A/C 400 manual ACT 4x4
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post #6 of 7 Old 06-01-2019, 11:29 AM Thread Starter
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Sled: 1997 Arctic Cat Powder Extreme 600 (Sold
ATV: 2002 Arctic Cat 500i Automatic 4x4
Well that appears to have fixed it..
Haven't gotten back out on the trails yet but the voltage is staying at 14 now. Thank you.

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post #7 of 7 Old 06-01-2019, 11:44 AM
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ATV: 03 400 4x4 auto FIS, 05 300 4x4
Excellent

Current Sled rides
2005 Sabercat 600 EFI LX
2006 T660 Turbo Touring
2016 Bearcat 2000XT

Past Sled rides
1993 Pantera 550 EFI
1980 El Tigre 6000

Current ATV rides
2005 A/C 300 manual 4x4
RTR Bushings & shock bushings
Motobatt Battery


2003 A/C 400 auto 4x4 FIS
RTR Steerlites & Shock Bushings
Motobatt Battery
26" Kenda Bearclaw HTR's


Past ATV rides
2003 A/C 400 manual ACT 4x4
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