This time of year, a lot of people have trouble starting their cars due to glow plug issues. Test and verify the glow plugs are working before you proceed to anything else. Also be sure to have a strong battery that cranks the engine fast. Do a search for glow plugs on this site.

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1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge