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

Whats Wrong With This Truck????

   
Old Dec 1, 2007 | 12:06 AM
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  #11  
xzaq103's Avatar
FormerVendor
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From: Fayetteville AR
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Muffler bearings yep most definitely muffler bearings

Seriously though get the timing checked and go from there.

Chris
 
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Old Dec 2, 2007 | 08:15 PM
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Originally Posted by xzaq103
Muffler bearings yep most definitely muffler bearings

Seriously though get the timing checked and go from there.

Chris
I thought muffler bearings at first but it spools good, n whistles nicely at idle.


all most everyone on every forum so far pretty much is pointing at timing right now.
 
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Old Dec 2, 2007 | 10:03 PM
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Originally Posted by Cowboy_Customs
I thought muffler bearings at first but it spools good, n whistles nicely at idle.


all most everyone on every forum so far pretty much is pointing at timing right now.
That means its the rear muffler bearing no doubt, or a spark plug issue.

Good luck with it.
 
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Old Dec 10, 2007 | 10:17 PM
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Timing/Fuel Pressure/Bad overflow valve can all look the same.
 
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Old Jan 9, 2008 | 02:35 PM
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As mentioned a bad overflow valve will do that. The fuel pressure drops off as engine speed increases, causes the timing to retard. Mine did that, OFV fixed it.
 
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