[s-cars] No Start ABY/AAN engine - Problem Found?

[Joshua Van Tol]

They do bounce around quite a bit. +/- 10 degrees was overstating it a bit,
but +/- 2 degrees isn't uncommon.

On Sat, Oct 2, 2010 at 6:22 PM, Huw Powell <audi at humanspeakers.com> wrote:

>
>
>
> > Second, you do not want the pins on the cam. The timing belt has slop
> > and the valve springs cause the cam to bounce back and forth in this
> > slop. This will cause an ignition timing variance. Because it's on
> > the cam that variance will be doubled. You do not want your ignition
> > timing bouncing around +\- 10 degrees ;-).
>
> So how come cam-driven distributor spark control systems don't seem to
> do that?
>
> Not saying they are rock-solid, but they sure don't bounce around that
> much.
>
> --
> Huw Powell
>
> http://www.humanspeakers.com/audi
>
> http://www.humanthoughts.org/
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