Long cranking before start.

[svranger25]

After sitting overnight the truck will take a good 5 seconds of cranking to start, after the first time for the day it seems like it gets better. i talked very briefly to my mechanic friend and he said injector o rings loosing pressure. any opinions on this? what do ya'll think it could be and if it is injectors, a good write up link and link for a decent set of orings would be great, thanks

[cowboychance]

Having the same problem, I talked to a fella and he told me that it might be my FICM going out and another fella told me the rings as well

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[svranger25]

what are your symptoms, i have no loss of power, idles smooth still, only thing bad is the longer starts after the truck has sat for a couple of hours

[cowboychance]

Same exact thing as you truck runs like a champ not sooting any codes or anything. Just takes a few to start, but it starts up right away if it sits less than an hour or two I wish I could figure it out

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[svranger25]

hopefully someone has an answer

[85_305]

Hpop could be draining back. these trucks naturally take a minute to crank, especially when cold... this is due to them being hpop.

I would get a new fuel filter and clean the fpr screen... I bet that helps out some.

[cowboychance]

Thanks ill try that

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[madpogue]

There is no FICM. What's the lube oil level? How long since it's been changed?

[cowboychance]

Well there is a FICM as a matter of fact my friends just had theirs replaced fer $1200. But the oil level is good just got it changed not to long ago. I change it on a regular basis.

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[Bigcountry8624]

As for the 7.3 I can't say but the 6.0 taking 6-6 seconds to start has to do with a leak in the high pressure rails small leak allows the pressure to lead off and the pop has to build back up if its not affecting the performance after start not worth tearing into