I checked the Temp II sender and it's within spec at ambient and operating.
Tried the O2 sensor again (didn't help).  The next odd ball thing I'm going
to try is the the throttle position switch sticking closed when the
throttle is open.  It smells a little rich, but hard to tell.

The thing that bugs me so much about this is that it's not when the van is
sorta warm, but it only happens precisely when it gets to operating
temperature - no sooner.

-Keith

On Thu, 1 May 2003 00:07:25 -0400, Keith Adams
<keith_adams@TRANSCANADA.COM> wrote:

>A few said it could be my O2 sensor.  I checked the ground for it, cleaned
the grounding
>point from head to chassis.  Drove it until it started misbehaving (right
at operating temp).
>Shut off the engine, disconnected the O2 sensor, restarted it and to no
avail.  Still no
>improvement.
>
>I removed the boot from throttle body to AFM and checked for cracks and
tears - none.  I also
>swapped the AFM for my spare, just to see.  None of it to any avail.  I've
also tried
>disconnecting the ISV which didn't help.
>
>I'm fighting this, the remnants of a blizzard that dumped 12-16 inches of
snow on us last
>Saturday, and a sinus infection.  I could fix the van right now with one
match if I thought it
>would work!
>
>Up until it's warm, the van runs like a dream.  Once at operating temp
though, all goes south.
>I can even hear it in the exhaust note - makes more of a flapping noise.
>
>Any help appreciated,
>Keith