First start of the day problem

[dlnoss]

The first time of the day starting my '99 F350 7.3 is difficult, no matter what the temperature.

I wait for the 'wait to start' light to go out, then crank it. It cranks real slow like the batteries are low. I turn the key off and back on and wait for the 'wait to start' light again. When I crank it the next time, it cranks a fairly normal speed and starts. I say 'fairly normal' but it cranks a little slower than my '01 F250 with the 7.3

I don't work on these much except for routine maint

Any suggestions would be appreciated

[jesilvas]

Check battery connections. Starter connections. Grounds. Bad connections do WEIRDDDDDD things.

Also, have each battery individually and/or the starter checked.
Even after the WTS light goes out, the glow plugs can stay on for 90+seconds after. The WTS is just the computers decision on how quick you can start it based on many temps and conditions. Not that big a deal. I always wait on mine but that's just me.