ATV Connection Magazine

Plug Fouling?

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Posted by: JayBR

Very easy to foul, just don't follow the proper starting procedures. I fouled mine first day I brought it home, first time I tried to start it.

It's also very easy to keep it from fouling, just follow the proper starting procedure. I haven't fouled one since the first day I brought it home.

Posted by: JayBR

I can't do it in 5 minutes but it's not too bad

Remove the plastic and the gas tank and make sure you have a deep socket that fits. I use a cheap T handle plug wrench with swivel head and ruber peice inside to grab the plug.

Posted by: JayBR

How is this correct offset determined?

I read it's set on a dyno at the factory, are you saying it should be dropped after a few hours are on the engine?

Mine was set at .80 from the factory

Posted by: JayBR

OK,

I remember someone telling me the offset had something to do with the difference in the the 2 injectors, and that the lower the number the closer they where matched.



Posted by: AlkyBurninX

It takes five minutes to change your spark plug. Now I remember why I ride a two stroke where the plug is nice and out in the open sitting in perfect view on top of the head. If I spent 5 minutes on each plug that I fouled, I would spend like an hour each week changing plugs. Man that would suck. Just kidding, I have never changed a plug in either of my banshees due to fouling. I guess fuel injection does have some problems too.

Posted by: smitty911

If you don't follow the starting procedure, you can but the hotter plug they are shipping with fixes that.

Smitty

Posted by: smitty911

Have you had your injector offset adjusted. The Cannons injectors start flowing more fuel that what they think they are and need to be leaned out some. This happens after several hours and the injectors are broken in as well. How many hours on the motor? The hotter plug I believe is the 8.

Smitty

Posted by: smitty911

All the injectors have a slight differance in flow rate. High performance V-8 you can buy matched sets to ensure that all 8 are giving the same.

Now on to our quads. You have two injectors as they are used they break-in as well, and start to flow more fuel, but the ECU thinks it's giving X based on duration, now with it flowing more at the same duration you have a rich condition and it is possible to fuel the plugs. This is not a knows all end all, this is just what happens.

If you are running rich there are several ways to lean it out. Offset, pulse width, etc.

Smitty

Posted by: madini

What's the number of the hotter plug Smitty?I still get really black sooty looking plugs.They don't foul out but I don't let them in long enough to stop the engine.

Posted by: madini

Smitty offset is now at 1.15 and still making black plugs.Installed an 8 tonight so don't know how that will work.My buddie's 2003 LE has 30300 map and offset at 1.1 with toaster pipe.runs great.I'm not sure where to go next,but it seems that latest Cannibal map works for fast trail riding,no stalls , starts easy.Just got a GP Control Diagnostic & Maintenance tool today,by next week I should have some answers.

Posted by: 727Banshee

How easy is it to foul a plug on a c-dale??

Posted by: 727Banshee

About how long does it take to fix it?

Posted by: armoks

I fouled mine four times before i got the proper starting procedure (my bull came with a fx400 owners man) so i got down to less than 5 min to change it