A '97 CV had similar problems with cooling system. Bad thermostat, mostly clogged radiator, failing water pump, lots of hot running (not necessarily "boiling-over" overheating), and always max pressure in the cooling system. Then started running poorly - missing, rough idle. Did a compression check and coolant spat out of cylinder #1. Replaced the head - it had a crack that was going from the combustion chamber to the cooling jacket.

Do a compression check and be ready for some bad news.

Edit: Also make sure the heater core is not plugged up.

Edited by TheShadow (03/26/09 02:30 PM)
'95 P71, 5xx,xxx miles, Rebuilt tranny, 2.73. Lives as a cab, and will die as a cab. (Died-FrontEnder)
'96 P71, 640,xxx on original drivetrain. (Now parts car - T-bone & roll)(You should see the roof - A,B & C-pillars chopped on driver side)
New to list: '96 MGM (Nice! @ 35x,xxx), '97 CV P71, '98 CV P71, '00 CV P71, 01 P71 (2 of 'em) '03 CV P71 (Nice so far) (All Ford Zinc Yellow w/Black decals & trim) And the list is growing...........
Taxicab mechanic: I HATE DRIVERS!