Sign in to follow this  
Followers 0
edeuce

Fouling plugs ?

4 posts in this topic

I have 2011 YZ450F and fouling plug bot every 4 rides ? I had an unplugged air sensor thought that was my prob. Guess not ! I have the MXA performance map loaded. Runs great but will foul plug @ first cold start.? Plug really black. Thinking maybe valve seals r leaking some. Wondering if anyone has this happen ???

Share this post


Link to post
Share on other sites

It sounds like you may have the incorrect spark plug.  One heat range too cold will do this.

 

Of course, it could also be weak ignition or a rich condition.

Share this post


Link to post
Share on other sites

 A rich condition could be the result of a leaking or otherwise faulty injector, or an incorrect PM signal from the ECU.  Could also be the ignition, as I mentioned. 

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0