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  #1  
Old 03-04-2013, 05:38 AM
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Hard cold start

I am having a rather long crank hard start

cranks for 3-5 seconds. after it starts first a cloud of black smoke followed by a trail of blue smoke. black smoke comes out in first 2 seconds the immediately followed by the blue and the blue stops by the 5 second mark.

2 new DEKA 1040 CA 880CCA batteries
NEW BPD FICM old one had 34 volts this one has 48 minimum
in the last year i replaced the dummy plugs stand pipes and STC fitting
the alternator charges at 13.8-14.1
I assume the glow plugs work correctly when i turn the key on voltage drops to 11.6 when i crank it drops to 11.3 and once it fires its back to 11.6-12 and after the seat belt light turns off ( 60 seconds after the truck starts ) the truck jumps up in voltage. and i assume thats the glow plugs kicking off.
no rough idle of any sort no matter the temps.

someone point me in the right direction or gives me some things to check/test please and thanks.
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  #2  
Old 03-05-2013, 04:57 AM
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i was paying a little closer attention to my alternator today and it seems if i got all the lights on and radio and heat it draws to much power for it to climb ti 13.6 or higher unless it kicks into high idle or unless my foot is on the pedal other wise its not charging strong enough. this is already my 2nd alternator i can be running strong and soon as i take foot off the pedal my voltage drops to almost 13 flat. so probably need to replace that but does anyone got anything helpful about the cold starting?
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Old 03-05-2013, 05:01 AM
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I noticed a big diffrence in my cold weather starts after going to t5. I got a feeling going full syn to the t6 would even be better. It just starts faster smooths out faster and alot less smoke.
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Old 03-05-2013, 05:02 AM
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i have run T6 for two years straight so thats not the problem i also run howes meaner power kleaner in winter and grey diesel kleen in summer or rev-x fuel in summer.
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Old 03-05-2013, 05:04 AM
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Mine does the exact same thing and I have 2 brand new Deka 1040 batteries as well as a brand new 6 Phase 58v BPD FICM. These are normal starts for cold weather.
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Old 03-05-2013, 05:09 AM
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ok i just thought i ought to check with the blue smoke comming out the black smoke never bothers me.
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Old 03-05-2013, 05:12 AM
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Blue smoke unless it is EXCESSIVE is normal under cold start conditions. Here's why.

Blue smoke is unburnt fuel exiting the cylinders/turbo/tailpipe when first started either from heavy fueling (tune) or because at first start and/or during idle the turbo isn't producing enough boost/air flow to burn all of the fuel in the cylinders.
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Old 03-05-2013, 05:27 AM
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i thought that was black smoke lol. anyhow you think i should go ahead and replace the alternator?
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Old 03-05-2013, 05:37 AM
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The principal is the same. The black smoke is when the turbo hasn't spooled at all. The blue smoke is just a small amount of unburnt fuel in the cylinders.

I think your alternators are fine for now. If they can't keep up once the GPCM is shut off then yes replace them.
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Old 03-07-2013, 05:53 PM
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I wonder if my long cranks are cold start also... People have viewed my thread with video, but no comments.... But I am in CA, its only been about 50F so it cant be that cold. I have no smoke.

If your showing up to 14v once running, I would think your alternator is working fine.
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