The mechanic at the local Ford dealer claims my starting problem stems from a "less than full battery charge"
Can a 2001 Superduty with 7.3 diesel turn over but fail to start or fire if the batteries are low? The truck turns over but does not start, 54000 miles in a heated garage to boot. Mechanic claims the motor needs to turn 100 rpms.

I put the charger on the vehicle for 3 hours and it started.
Please help, I am going to frozen Michigan Friday to snowmobile, and I dont want to have trouble there.

BTW, batteries are less than one year old.

Thanks everyone.

Rick

One other thing, the mechanic said to charge the batteries for 24-36 hours. There is a chance my daughter left the back door (driver side) open by mistake overnight (We found it not fully shut, therefore inside courtesy lamp was on)

 

I have read about that before. You must need to turn over at a certain speed to create enough heat???
Yes, you should trickle charge them overnight minimum.

 

i too have heard of that problem. the batteries can have enoigh juice to crank the motor but not start it.