3rd Gen Engine and Drivetrain -> 2007 and up 6.7 liter Engine and Drivetrain discussion only. PLEASE, NO HIGH PERFORMANCE DISCUSSION!

Long Crank on the 6.7

Old Oct 30, 2007 | 03:21 PM
  #1  
donandcat's Avatar
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Long Crank on the 6.7

Does anybody have the long crank issues on their 6.7 like we had on the 5.9 standard trans

Here so far so good
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Old Oct 30, 2007 | 05:47 PM
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Mines not bad but seems like it should start upalittle faster takes 5 or more seconds
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Old Oct 30, 2007 | 06:28 PM
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Mine is almost immediate. Certainly not more than two seconds.
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Old Oct 30, 2007 | 08:59 PM
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Forget to say mine does it 50% of the time the rest it starts right up
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Old Oct 31, 2007 | 01:00 AM
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Originally Posted by sabersix
Mine is almost immediate. Certainly not more than two seconds.
Same here.
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Old Jan 28, 2010 | 10:19 PM
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I find that if I wait a two or three seconds my truck starts right up. If not it will take much longer than my 5.9.
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Old Mar 10, 2010 | 06:32 PM
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i was just about to post about this problem.. my long crank is intermittent also. sometimes it will start right up within a second sometimes takes about 4 seconds it only takes long like 30-40 percent of the time though..does anyone think this is a problem?
Dont ask why but i ran out of gas before with but put a gallon in bumped the starter and it started right away. read that there is no prime button like the old 5.9s
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Old Mar 10, 2010 | 07:30 PM
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From: Home: Kaplan, LA - Pipelining In: Pecos, Tx
I have found that If I just jump in my truck and try to start right up sometimes I get a longer crank time. If I let the chime ring once I find it cuts down on the crank time.


But relatively, its still a rather long crank time compared to my '90. That sucker fires off on a half spin of the starter.
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Old Mar 10, 2010 | 08:41 PM
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I am having the same problem sometimes it starts right up and other times it takes a few seconds hope it is not going to be a big problem. I did notice the other day after a road trip of 400 miles and the batteries fully charge it started right up everytime so i am wondering if it might be the batteries going bad
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Old Mar 10, 2010 | 08:43 PM
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Ive already had to replace the batteries on mine. Passenger side was bad. It wasnt a long crank issue though. It was a no crank issue.
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Old Mar 10, 2010 | 11:08 PM
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If you treat it like a computer and let it boot before you start, it seems to keep it from having to catch up on the go. Even without the grid heaters, I let it sit for 5 seconds before cranking. The 97 is "dumb" and only needs a spin to get the fuel going, no computer there to fool with..
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Old Mar 11, 2010 | 05:11 AM
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From: Home: Kaplan, LA - Pipelining In: Pecos, Tx
Originally Posted by Lil Dog
If you treat it like a computer and let it boot before you start, it seems to keep it from having to catch up on the go.
Makes perfect sense
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Old Mar 11, 2010 | 06:05 PM
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Originally Posted by Lil Dog
If you treat it like a computer and let it boot before you start, it seems to keep it from having to catch up on the go. Even without the grid heaters, I let it sit for 5 seconds before cranking. The 97 is "dumb" and only needs a spin to get the fuel going, no computer there to fool with..
True, that's the secret.
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Old Mar 12, 2010 | 02:02 PM
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From: Home: Kaplan, LA - Pipelining In: Pecos, Tx
I was just thinking. That may also have something to do with the long tip start cycle on the new '10's that pop up every once in a while.
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Old Mar 12, 2010 | 09:17 PM
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I always wait for the five "dings" before I bump the key or switch. Seems to be fine.
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