Mark,
thanks for the information.

At idle 850 rpm, warm no cold enrichment, my needle wavers 1 to 2
lines (1 or 2 in Hg) around 12 in Hg.  The wavering is small.  My tach
needle also wavers.  At above 1,200 rpm to high RPM, the needle is
steady at 19 in Hg.

I've looked at pictures on the Internet and it appears that "wavering"
usually refers to a swing of maybe 4 inches either way.  I don't have
this.

I do have a cylinder misfire and a lot of extra parts I can use for
swapping.  I just want to limit the amount of swapping I have to do.

I'm still learning.  I'm going to look in the archives.

Thanks.

Regards,
Craig

On Fri, 8 Oct 2004 14:06:04 -0700, Mark Keller <kelphoto@shaw.ca> wrote:
> Hi Craig,
>
> I'm somwhat familiar with vacuum diagnosis.  AT idle, 850 rpm, and a
> warm, ie no cold enrichment , my van sit about 13-14 inches.  The
> operation or movement of the vacuum gauge is the meat.  A vibration
> movement, worn guide, 2 points of movement slow, worn plugs, occasion
> drop, valve /intake leak, constant low, vacuum leak/ timing issue.  That
> the sketch.  If you'd like to gather more information on general setting
> and tuning of the fuel injection, look under my last name in the
> archives say 98-3003.
>
> Mark Keller
>  91 Carat
>