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I used to own a Cummins.
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59 Posts
Discussion Starter #1
Enigine misfires when cold until warms up or get on the skinny pedal to almost redline and then comes out of it. Will run fine the rest of the day and maybe the next. Longer it sits the worse it is? Injector problem or HPOP?
 

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OEM Moderator
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9,381 Posts
Sounds like a probable injector issue. A cut out box would be the perfect tool for testing on this issue.
 

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I used to own a Cummins.
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59 Posts
Discussion Starter #3
Would a buzz test prove a bad one?
 

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All done now
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22,486 Posts
It might, a buzz test, tests the electrical side of the injectors.
 

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Addict
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12 Posts
May consider running a contribution test as well as the buzz test. I have a similar problem with mine now, its my #8 injector intermittently failing. (no codes either) It passes the buzz test but fails the contribution test
 

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I used to own a Cummins.
Joined
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59 Posts
Discussion Starter #6
Will have to try. I have a spare set of injectors. Maybe rebuild them and then swap sometime.
 
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