Do you think that I could have an intake leak that is causing this fluctuation? This makes no sense to me.  How could it be fluctuating??

 

Bill B

How much faith do you have in the quality of your injectors?

I noticed from my run logs that I sometimes get an AFR that drops out the bottom.  It will last for a second or two, and then goes away for 30 to 45 seconds.  It only happens when the secondaries come online, and was much worse when I had the computer configured for a higher number of squirts, eg. they opened twice as often for half the time.  I can definitely see a 'hiccup' in the log graphs.  I'm having an inclination to blame it on an injector getting stuck open, and momentarily flooding the engine .