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

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Old Dec 24, 2012 | 08:17 PM
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Hey guy are the 12v prone to runaway being that they have no computers. I just wanted input on how do you guys prepare for this. I doubt i will be willing to stand next to a reving motor to pull off the air intake and shoot a CO2 fire extinguisher into it. So has any one bought a CO2 remote extinguisher, mounted the nozzle into the intake and the switch on the dash. And when it revs hit a switch. Just wanna be safe and prepared thanks. or better yet is there a air shutoff kit i can buy i see they need it in truck pulls but i looks like they aint running a air intake. And i also have a manual so can i just shift up and dumb the clutch to chock it out.
 

Last edited by yfzrunner; Dec 24, 2012 at 08:54 PM.
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Old Dec 24, 2012 | 10:10 PM
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you would be incredibly lucky to dump the clutch to stall out a runaway Cummins. ive had the 3-53 detroit run away in my 230 timberjack with a full hitch behind it and just spin the clutch. I dont think with proper pump tuning and a correct gov. spring you will have any issues with it running away. But just in case for my truck i have a cone filter on my turbo that if pulled hard enough will come off without a wrench and a thick piece of rubber from a conveyor belt to choke it off.
 
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Old Dec 24, 2012 | 10:30 PM
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a turbo leaking oil will cause a run away. on sled pullers we have flaps on the turbo nose to shut down engine but no air filters.
 
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Old Dec 25, 2012 | 03:01 AM
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I heard p-pumps can't runaway like a 1st gen can. Never heard of it happening I wouldn't be to worried about it myself.
 
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Old Dec 25, 2012 | 09:01 AM
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yes i heard it was rare. But my truck came a little turned up and he said he just moved the fuel plate forward but who knows what else was done . I know it barely smokes and has a manual boost controller pushing about 30psi. I just wondering if any one has or makes a manual shutdown that i can run with stock intake or even a after market one but a filter is a must. Im always paranoid thanks guys.
 
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Old Dec 25, 2012 | 09:21 AM
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bd makes a shut down. we can get them.
 
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Old Dec 25, 2012 | 11:49 AM
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yes i probally would be interested in one after new years but how much we talking i seen them for for 1500 bux. I just want to be on the safe side and were are they mounting them at. Some say at the intercooler and some say after the airfilter but im not sure i fear turbo seal going bad more then anything. But want a correct shutdown for any type of runaway and this will work with the factory air intake got any pics let me know im interested.
 
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Old Dec 25, 2012 | 01:13 PM
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Out of curiosity, what would happen you you just uh... turned the key off?
 
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Old Dec 25, 2012 | 05:36 PM
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It releases the fuel shutdown solenoid which kills the motor unless its a true runaway and sucks the oil from the bottom end. Only way to stop that is killing its air supply. Like stated earlier there's the flap to choke it.
 
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Old Dec 25, 2012 | 05:39 PM
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Or turbo**
 
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