Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

hard starting?

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Old Apr 11, 2013 | 02:06 PM
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Ok well I wiggled the connection on the boost sensor and the check engine light went away and its not doggy anymore has all the power in the world the only issue I'm still having is the hard starting the truck will crank for 20 to 40 seconds before starting and when it does start I get a huge puff of white smoke, it does this whether its plugged in or not, does anyone have any idea why?
 
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Old Apr 11, 2013 | 02:11 PM
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willis what codes if any and dont crank for more than 15 seconds with at least a minute between to allow the starter to cool or you will be rebuilding or replacing the starter
 
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Old Apr 11, 2013 | 02:13 PM
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Mayhem I'm not throwing any codes now, I did have a boost sensor code but I played with the connection on the boost sensor and the code went away and hasn't came back and all my other symptoms went away with it just not the hard starting
 
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Old Apr 11, 2013 | 02:23 PM
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hmm ?? does the truck randomly stall out??
 
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Old Apr 11, 2013 | 02:28 PM
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Nope it doesn't it has never once stalled out on me, before I wiggled the connection on the boost sensor it would kinda hiccup and lose its get up or hiccup and the get up would come back but ever since I wiggled the connection it hasn't done that anymore either, it runs great and has all kinds of power, I just can't get this hard starting figured out
 

Last edited by willis964x4; Apr 11, 2013 at 02:31 PM.
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Old Apr 11, 2013 | 02:44 PM
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I'm not 100 percent sure What I'm wondering if the optical sensor Isn't going bad???
 
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Old Apr 11, 2013 | 02:52 PM
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I honestly have no idea what it could be, I was kinda thinking I might have bad/weak glow plugs but I could be completely wrong
 
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Old Apr 11, 2013 | 03:47 PM
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well do you have excessive white smoke when it finally starts ??? if so that could be a sign of bad or weak GP's check all the wires going to the GP's there are also fuse links that you will want to look at as well
 
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Old Apr 11, 2013 | 04:15 PM
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Yes I have excessive white smoke when it finally starts, and what also makes me think its glow plugs is after it warm and I shut it off and go to start it again it starts on the first crank every single time
 
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Old Apr 11, 2013 | 05:55 PM
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Yeah I would say it's the glow plugs
 
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