1999 cummins with a smokey stuttering on and off idle

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bnokle

Junior Member
Joined
Apr 8, 2015
Posts
12
Reaction score
11
Ram Year
2007 3500 ram
Engine
hemi 5.7
My mileage has gone down about 1mpg and its really smokey at start up. Like you are crying if your near it and even after warmup I can smell it while stopping at lights etc... (cracked manifold) But anyway after its warm it runs fine or seemd to and if I let it idle it will on and off do this little stumble in the idle. My best guess is injectors, injector pump, or computer. It's a 99 2500 with around 200000 miles on it. Automatic, 2wd Just looking to see if this is a common thing?
 
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