1 (GP run time) - Usu. an extra 10-15 seconds after the WTS light goes off
2 (oil gauge) - I always forget to look (sorry)
3 (crank time) - Maybe 4 seconds? I'd say about twice as long as if it's plugged in (or a warmer day)
4 - Isn't this the same question?
3 and 4 may be exactly the same in your case since its running right. For me, when it is cold, it usually clacks for a second or two and shudders and tries to start before it actually succeeds. From the sounds of it, in your case, when it starts clacking it starts running - simple as that.
What all was replaced wrt. the gp system? New wiring / UVCHs? Have you TESTED to see that it all works? When the engine finally starts, does the voltmeter say left-of-center for a minute or two, and then swing right-of-center?
I believe wiring/UVCH/relay/plugs/starter/starter wiring was all replaced, I'd have to go back and check my receipt to verify that though. Visibly I am certain that the relay is new as is all wiring to/from the relay, and the valve cover harnesses have some new wires spliced in. I have not tested to verify that it all works. I do know that before the truck had the GP system replaced it was much worse about cool (60 degree) starts and now it will actually start, at least when its fairly warm, without being plugged into the block heater. All of my testing and experience with this truck started in November, and I've never had or been around one of these era diesels before, so I really don't know what to expect. I am used to the SD 7.3's and 6.0's (my dad has had both), so I know better what those behave like year-round.
I will watch the voltmeter next time. I know that when the truck is turned to ON it sits around O, when the GP relay kicks in it moves just left of N, and once its running I think it sits around A or L. I am not certain whether it moves instantly (I think it does) or if it takes a few minutes to swing right.
What brand of GPs and relay are you using? If you replaced any wiring/harnesses, what brand?
A shop did it so I am not certain of all the brands. The plugs are Motorcraft, I am not certain of the wiring/harnesses or the relay. I can check when I get home later today.
BTW, you don't "cycle" the glow plugs. They run for up to two minutes when the engine's cold. Just leave the key in RUN an extra 10-15 seconds before turning to START.
Because mine tends to be such a dinosaur, I have, in attempts to start the truck, waited 2 minutes until I hear the relay click off and repeat the cycle again. I do not key off/on as soon as the WTS light goes away, I wait until after the relay itself finishes.