My 91 IC with bigger injectors took about 10-20 sec to crank over today. It was around 20-25 degrees though, it has bigger injectors, and hasnt been started in around a week. Since, im new to diesel is this normal or no? But once it started it ran great!

 

Yes that is completely normal. Diesel trucks and cold do not get along well. You might wana consider keeping it plugged in at night... Unless you don't have a block heater.

 

Make sure you wait for the 'wait to start' light to go out. It will heat up the intake heater for easier cold starts.

 

Or you lost prime, mine starts on the 1st crank in 20*F weather till i developed a leak at the VE, fixed it today and back to normal, i dont plug it in either being in norcal, but latley its been just cold here at night and never have a problem. It starts better than my DDEC III freightshaker.