COIL ISSUE ?

[lorne1176]

Have a 04 Mountain Cat 900 with 300 original miles. Issue I'm having now is right jug is cutting out thinking it may be the coil. Anyone have or ever here of such a problem before?

 

[Rixster]

Having the same problem right now on a 06 king. Is your EFI ? We have already swapped out the coil with no change. We found a broken chassis ground and are now going to go see if that makes a difference. If not we are going back to the stock pipe and silencer to see if that makes a difference.

 

[1Mike900]

Swap coil wires and see if it follows to the other cylinder? Also check the sparkplug boot connection with the wire. Check ground wire on recoil cover.

Mike

 

[lorne1176]

Having the same problem right now on a 06 king. Is your EFI ? We have already swapped out the coil with no change. We found a broken chassis ground and are now going to go see if that makes a difference. If not we are going back to the stock pipe and silencer to see if that makes a difference.

Yes mine is EFI as well. I just did Y pipe and pipe this year and was the first time out since the mod. It did do it also on one occasion last year but smarttened up and no problems. Thats whats making me think it could be a coil. Another suggestion made to me was a sticking power valve. Is that possible? Let me know what you find Rixster. Are you running a Boondocker as well? I by passed mine and my EGTs were within limits and plugs looked fine.

 

[Zerrman]

cut out on right side

Thats funny i have an 05 king efi and mine has been doing it and driving me nuts. I have changed injectors, disconnected wiring, changed coils, checked reeds, checked ground. I just swaped the fuel pump and havent rode yet but I did install an inline fuel pressure gauge and when it started missing on the on cylinder the fuel pressure had dropped to 25# So hopping this fixes the problem. I have been told the fuel pumps are none for going intermitintly in and out and hoping problem is fixed. Riding tomorrow so will post after ride. Anyone else has any suggestions let me know. Thanks Greg

 

[PowderCrew]

Hahaha... WOW! GREAT TIMING! In the last 2 weeks I was chasing the issue. Had the "clip" inside one boot that was cracked out and finally broke. Thought I had it fixed with a new boot, then today was losing the other side. Found the wire had seperated just enough at the coil... get a new coils and it SHOULD fix it! The boot issue and wire issue were seperate sides... all at the same time.

 

[lorne1176]

Hahaha... WOW! GREAT TIMING! In the last 2 weeks I was chasing the issue. Had the "clip" inside one boot that was cracked out and finally broke. Thought I had it fixed with a new boot, then today was losing the other side. Found the wire had seperated just enough at the coil... get a new coils and it SHOULD fix it! The boot issue and wire issue were seperate sides... all at the same time.

I will try that avenue.

 

[Rixster]

Mine ended up being the main chassis/motor ground wire that goes from the recoil to the bulkhead. It was unhooked and the bolt rolling around in the belly pan. Hooked that back up and she is fixed ! Running just like it should.

 

[lorne1176]

Did I mention I removed the shelf with the air horns out of the air box. Would this have any effect?.......I wouldn't think so..

 

[1Mike900]

Rixter glad it is fixed, there is a reason they have it there? The engine mounts must not be the best ground even with 4 or 5 bolts going to the frame. If one fell off I bet you wouldn't realize it right away? Not until it cooled a little from a lunch break or what have you?

Mike

 

[Rixster]

The motor mounts do work as grounds, they are rubber. As for why the ground wire is hooked to the recoil bolts, I have no idea. I guess that anywhere you can get a wire from the motor block to the bulk head it should work. Maybe they put it on the recoil is cause the stator is under there and it is grounded to the motor on that side.