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

Rev Limiter WTF

Old Jul 13, 2010 | 06:31 PM
  #1  
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Default Rev Limiter WTF

Ok its raining in ohio right now and i was playing and i kicked it down it went sideways and spinning but it sounded like it had a rev limiter i know it has gov springs and should rev about 2800 to 3000 but about 2100 it sounds like a rev limiter!! HELP
 
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Old Jul 13, 2010 | 06:45 PM
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I'm confused as to what you are asking? You say you know it has gov springs but wonder why it governs it's self?
 
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Old Jul 13, 2010 | 06:49 PM
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no i thought i would rev higher than that and why the popping noise i figured it would level out!
 
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Old Jul 13, 2010 | 06:58 PM
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poping can be from a few things, but i would feel safe to say you either don't have enough fuel, OR your timing needs to be advanced.

my truck with stock timing would pop and spit and sputter when free-reved. when kicking it in the rain you don't have a load on the motor like you normally will have, therefore you won't have as much boost as if you were driving on dry asphalt.

with my 370's and 191's i had plenty of fuel with a slight load to spool the turbo when "kicking it" in the rain but my timing being stock it still would pop some. sitting still anything over about 2300 sounded like a SBC with glasspacks. with boost at around 2900 and above it sounded the same.

so i'd first say timing, then fuel, but it could be either....
 
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Old Jul 13, 2010 | 07:25 PM
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i agree with timing mine had a popping backfire sound until i got it timed now runs great
 
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Old Jul 13, 2010 | 07:54 PM
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i have fuel, so my timing must have jumped because it just started to do that i have done this plenty of times first time it started to pop like a sbc with glasspacks
 
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Old Jul 14, 2010 | 07:51 AM
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Its most likely timing for sure. In my experience a fuel "pop" didnt seem to be as loud. However im sure it can be in the right situation.
 
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Old Jul 14, 2010 | 07:12 PM
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timing for sure mine did that but i also had a prob getting the rpm i wanted with stock springs
 
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Old Jul 15, 2010 | 11:34 AM
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mine popped pretty bad at around 2900+ before i put the airdog on it, it still does a little but only way at the top, but im gonna bump the timing some more pretty soon
 
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Old Jul 16, 2010 | 07:58 AM
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what did you have the timing set at? I would say try maybe 16.5* - 17* timing.....but it depends on your mods
 
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