Intermittantly my 1996 850 non turbo will crank without fireing. After one minute it will start. Once it runs it will start just fine until it sits for an hour or so then not start again. I just replaced the crank shaft seal and position sensor; PCV line elbows (rotted); Dip stick well seal; micro switch; Engine computer. This car was a salvage car from a flood so I have some electrical contact problems as well. I have had the car for 4 years with little trouble. Does anyone have an idea? My local Volvo mech here in San Francisco is stumped.