Jim,

This is how my engine ran when the temp sensor II failed.

In another related case on a different van, the wire from temp sensor II was
badly corroded under the wire's insulation and finally prevented
conductivity. Took me awhile to discover this ( It shouldn't have because I
should have checked the conductivity as a basic troubleshooting method at
the beginning of my diagnosis ) Also I would check the infamous green coax
Oxygen sensor wire.

Hope this helps

Rick