Hi Chris,

I think the only difference between A and B is the B controller does
not use the input air temp sensor.  Of course all the parameter
settings can be different.  You can copy A to B, but not B to A.  If
you have never copied A to B, you might want to reset A to factory
defaults since that's would be what's in B.

Bob W.


On Sat, 17 Oct 2009 22:49:22 -0400
"Chris and Terria" <candtmallory@embarqmail.com> wrote:

> I am still trying to get the engine to run smooth.  It has been surging on
> me.  With fuel pressure steady, the mixture and the RPM jump around a lot (I
> haven't started taking exact readings yet, still trying to reduce/eliminate
> surging).  
>
>  
>
> Today I tried swapping around the vacuum lines, and as an afterthought, I
> selected the B controller, and the engine smoother out, and RPM jumped up
> considerably.
>
>  
>
> So I am wondering what the difference is between the two.  What are the
> extra things that A looks at that B doesn't?  This will help me figure out a
> troubleshooting procedure.  Maybe I can isolate the faulty component.
>
>  
>
> I looked through the EC-2 manual and couldn't find anything listed.  Maybe I
> missed it.
>
>  
>
> Chris
>
>


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