12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

94 cummins 12 valve

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Old 11-20-2010, 10:09 AM
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Default 94 cummins 12 valve

so i went out to my truck today hoped in an turn the key to let my glow plugs warm up i turn the key an fired it up it started then stalled i go hmmm i did the same thing fired it up an it stalled,so now at that point im mad so i fired it up again an put my foot on the gas pedal an just steady idled it an while doing that i see a cloud of blue an grayish color smoke out my back window an go hmm what is that?im pretty stumped guys thinking either injectors or? need the help guys thanks

it has a fuel plate an intake along with a spring kit as well as a straight pipe thanks in advanced
 
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Old 11-20-2010, 10:30 AM
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whats your timing at? if its really cold you will have to keep on the throttle for a few seconds. if your idles to low and its cold they will die.
 
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Old 11-20-2010, 10:37 AM
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just had the timing re done but but my thing was the smoke it was very scary looking man i had it plugged in over night so idk how it would be that cold?
 
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Old 11-20-2010, 03:54 PM
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mine smokes pretty good at an idle in the winter. but idk why it would be if you plugged it in and such. timing could have slipped tho
 
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Old 11-20-2010, 04:03 PM
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hows your fuel pressure?
 
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Old 11-20-2010, 04:31 PM
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First off Cummins does not use glow plugs, they use an intake heater or grid heater. It heats the air as it enters the head.

Sounds to me like your timing has slipped. Its a know problem if the pump shaft is not squeeky clean when you turque the gear down. Did your wait to start light stay on longer that the rest of the lights? If so then your block heater might have gone belly up or it tripped the breaker for your power cord.
 
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Old 11-21-2010, 10:10 AM
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Check you air box. My buddy had a rat nest in his and it was smokin like he was burnin the tires. We cleaned it out and it cleared up quick
 
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Old 11-21-2010, 06:43 PM
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Originally Posted by 94cummins diesel
just had the timing re done but but my thing was the smoke it was very scary looking man i had it plugged in over night so idk how it would be that cold?
What did you have the timing set to? How does it run when it's warm? If you had it plugged in and it still smoked a lot, you're timing has probably slipped. When it was timed they likely didn't get the shaft clean enough before tightening the nut.
 
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Old 11-21-2010, 10:01 PM
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well heres the news guys leaky fuel pump hose going to the pump cracked block blown headgasket ran mint when warmed up timing was im guessing traditional dont no exactly an the truck is going under construction new block an all new insides should be great thanks for all the help
 
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Old 11-21-2010, 10:07 PM
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WOW that sucks. Atleast now you can build the way you want it
 

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