Just got back from a test run and I was thinking about your post and how long it took to start. Cold engine start took two secs. on my truck.

have used Rotella 15-40 from the get go and kept it changed just because of the high pressure oil pump. I heard they were expensive and liked clean oil. When it started it was like flipping a switch. One day it just took longer to fire. I had a "oh chit moment" in my head and was about to let off the key when it fired. ( i thought it wasn't going to fire) it's been that way every since. I finally got caught up around here.. I'm going to go see if I have the right key for my scanner and see if it threw any codes........it hasn't acted up again since sunday.................we'll see

Well we live in the same neck of the woods and I switched to Rotella T6 5w-40, but I just got finished overhauling the top end on mine. Mine used to take a lot longer in starting, but honestly I can't say the oil or the Revx specifically were the reason for such improvement.

Does it actually crank slower, or still crank the same speed and just not fire right away? Really would be nice to get a scanner on it and measure your ICP values

starter spins motor over at same speed. just takes longer to fire . ICP Values I'll have to check . I saw more acronyms than I could shake a stick at, but it did throw a couple of codes just a while ago.........C1175 and C1236 both point at LR speed sensor input circuit.....LR (left rear) surely not .... only wire I saw was the sensor on top of the 3rd member...(brain gears grinding) ABS sensors are on each wheel? or does sensor read ......no that couldn't be
I do have a scanner ........... I'll go hook it back up

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ICP V = .26
ICP press = 0
ICP DSD = o

what does ICP stand for?

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wow big difference when you start it...ICP V = .89 roughly
ICP Dsd rock solid at idle 4000
ICP Press slightly less
both increased proportionally with RPM

Will this help?
Also ICP is injector control pressure switch.

Hope this helps.
Also ICP is injector control pressure switch.


Attachment 18685

I was guessing injector control pressure.......would've never guessed the switch part. My scanner reads in kPa.......I'll have to research that. I've still got scanner hooked up and will continue to monitor while brain approaches saturation level.
thanks everybody