With the van mostly reassembled, Andy starts it up and connects his PDA to the diagnostic port beneath the steering wheel. If you have a Palmpilot capable of running the software, you can order it and the interface cable from several supply stores, some of them on the internet. Then you can look at the diagnostic messages of your own vehicle! Andy is using a Palm m505. While he sat in the passengers seat monitoring the O2 sensors, I drove the van around Sacramento. It ran much, much better than before.