OK I got a CEL on and finally read the codes:

0c, 0d - O2 sensors (theyve been on 100Kmiles)
19 Ignition Coil 1 (oil on coil due to valve cover gaskets?)
17 Ignnition Coil 6 (oil on coil due to valve cover gaskets?)
10 Cranks Sensor bad connection; ground?

Which do I attack first?

Thanks

Ramon