Thanks for the input guys.  I checked the air pressure and they were set right at the max.  I let some air out but all I have done since then is blade my drive which is pretty smooth.  I am sure it will help some though.  
I was really impressed on Monday morning when it cranked so well at -7 without plugging it in. I normally would plug it in for a couple of hours but I was in a hurry to clear the drive from the drifts that blew in over night. It cranked right up after cycling the glow plugs 3 times.
	
		
			
		
		
	
				
			I was really impressed on Monday morning when it cranked so well at -7 without plugging it in. I normally would plug it in for a couple of hours but I was in a hurry to clear the drive from the drifts that blew in over night. It cranked right up after cycling the glow plugs 3 times.
 
 
		 
 
		