2000 XJ Sport No Start Final Report:
Valve in oil pump was stuck and caused pressure to build in oil filter (to the point it blew off when the engine was revved). Engine was not getting any lift causing no start. Replacement of oil pump, fie quarts of oil, labor, TAX (in Manhattan) = $480.00
Ouch.
I hope it is up and running for a good while now. The truck knew I had gotten a tax rebate check and wanted its cut.