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

poping at 2000 rpm or more

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Old 12-07-2008, 01:53 PM
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Default poping at 2000 rpm or more

96 dodge with a number 10 torque plate thats all done to it right now. When I first start it in the morning or if it sets awhile. I can drive it down the road anything 2000 or more rpms it starts poping and oil smoking. after it warms up alittle it runs fine. any ideas timing, injector.
 
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Old 12-07-2008, 02:11 PM
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u need to let it warm up

taken from: http://dodgeram.org/tech/dsl/FAQ/cold_wx.htm
The Cummins B will reliably start at temperatures to -20 degrees F without the block heater, but the engine is much happier if the block heater is used. It may take several manifold heat/start cycles before the engine fires and continues to run. Expect a large smoke cloud, engine and accessory whine, knocking, and vibration until things warm.
Below -20, some block heat is usually needed to get the engine to reliably fire. Always allow the oil to warm before using heavy throttle or running the engine above 2000 rpm. An electrically operated magnetic oil pan heater will help warm the oil and make the engine easier to turn over. Espar makes diesel fired block heaters for people who can't plug the truck into an electrical outlet. In cold weather Cummins Premium Blue 2000 semi-synthetic engine oil flows better than regular 15W-40, but it does not have the required SF or SG rating!.
 

Last edited by oglejust; 12-07-2008 at 02:29 PM.
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Old 12-07-2008, 04:53 PM
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Originally Posted by big_dog37074
96 dodge with a number 10 torque plate thats all done to it right now. When I first start it in the morning or if it sets awhile. I can drive it down the road anything 2000 or more rpms it starts poping and oil smoking. after it warms up alittle it runs fine. any ideas timing, injector.
yep need to warm it up more i dont even exceed 10psi of boost or more than 1400RPM untill i pop my thermostat
 
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Old 12-07-2008, 06:53 PM
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agreed, or set the idle higher to help it warm up
 
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Old 12-07-2008, 09:23 PM
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i love watching guiys start a diesel in teen temps and then just drive it, had a kid with a 96 cummins my senior year in high school do it every day, start and drive away two weeks later he wernt doing that anymore after having to buy new injectors from fouling the hell out of them
 
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Old 12-07-2008, 09:36 PM
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not only that but if ya dont let it run for atleast a few minutes your not letting your not letting your oil get all the way thru your engine and lubricate all your engine, and 15w 30 oil has the viscosity of molases when its real cold, you might also want to see if your getting enough fuel pressure
 
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Old 12-07-2008, 09:40 PM
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he shouldnt have an issue with defueling them p-pumps put out alot of fuel, let her warm up for about 5-10 minutes then dont get over 1500 till the thermosat opens then roll the coal and you should be fine, i run dello 15w-40 all year round here even in sub zero temos, just let the truck idle for 10 every time, even after work
 
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Old 12-07-2008, 09:45 PM
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yeah i wasnt real worried about the injector pump i was thinkin about the lift pump
 
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Old 12-07-2008, 09:49 PM
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lift pump might be bad i had to replace mine about a year ago only problem is i put a stocker back in should have went with a FASS
 
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