Transients

[Andris Skulte]

> <unlurk>
>     First the disclaimer. I tend to speak in a way that some people have a
> problem with. I can come across as being condescending and the like.

I seem to have the same problem sometimes. He he he - I've been apologizing
and explaining myself way too much lately :/

> control engine speed. As we go to WOT there is a transition
> period equal to
> the lenth of time it takes for the air, at atmosferic pressure,
> to move past
> the throttle and reach the cylinder.

Regarding the original post - how do you know its a lean miss, rather than
an over-rich condition? This is how I'm thinking of it - You're at high rpm,
closed throttle, 20+ in Hg vaccuum. You go WOT, and almost instantly the
manifold goes to zero vacuum, which your MAP sensor reads "instantly". Your
acceleration enrichment circuit sees this, and richens it above and beyond
the regular WOT conditions "instantly". There is a ton of fuel in the intake
port, for the first cycle or so, while the slug of air travels down the
runner. Could it be likely that your electronics systems respond faster than
the physical air, and over-richen it?

Andris/Z28tt