Would this cause a no start also? I've had this problem for a while (no start). I will explain. If, I start my truck at 7:00am and drive my daughter to school which is a total round trip of 4 miles then get back home and go to work at 11:00am it starts up fine drive a mile to work...work till 730 come out it starts fine drive the mile home. That's the easy part. But if I get home from work at 7:30pm and start my truck up at 7:00am the next morning it starts, BUT if I let it sit till 10 and not start it at 7 it won't start I will try and crank it 4-5 times it cranks but won't start so I got to work t 11 and get home at 745 and crank it 2x and it starts. I hope you understand this!!!! ANY HELPS APPRECIATED!!!!!!

 

Doubt the coolant leak and no start are related.

Need to check fuel pressure and spark when engine does not start.