signs of cp3 and injector failure/going bad - Dodge Cummins Diesel Forum
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Old 01-04-2011, 11:33 PM   #1 (permalink)
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signs of cp3 and injector failure/going bad

got a good bit of miles on my injectors and cp3 and just wondering what are some signs of them going bad besides white smoke and hard start.
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Old 01-04-2011, 11:36 PM   #2 (permalink)
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shake, lots of smoke or more smoke than usual, bad fuel economy, loss of power. the big thing seams to be an off balance idle or a shake at idle. I have heard a good rule of thub is to open your driver door with the truck ideling in park, if you open door which is hanging freely is shaking alot, thats a good sign of an off balanced engine.
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Old 01-04-2011, 11:40 PM   #3 (permalink)
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hmm not really noticed any excess shake or anything on the lines of that, but sometimes i do think when i accelerate my smoke is less black than it use to be. I might just be crazy but i bought the truck at 150k miles and it now has 220k.
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Old 01-05-2011, 12:02 PM   #4 (permalink)
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ticking, my old set of injectors had a definite tick to them just before I switched them out. it would be intermittent, all the time cold, sometimes when hot. If you have a rail pressure gauge and you've been watching it fairly closely I noticed my rail pressure numbers getting worse and worse and worse as the injectors leaked off more and more flow. I went from 90's to 120's and GAINED rail pressure. My truck always had a haze just before I pulled the injectors in it. Not so much at an idle, but at any load I could see a bit of black coming out of the stacks at all times.
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Old 01-05-2011, 12:52 PM   #5 (permalink)
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Originally Posted by Shibbyutman View Post
ticking, my old set of injectors had a definite tick to them just before I switched them out. it would be intermittent, all the time cold, sometimes when hot. If you have a rail pressure gauge and you've been watching it fairly closely I noticed my rail pressure numbers getting worse and worse and worse as the injectors leaked off more and more flow. I went from 90's to 120's and GAINED rail pressure. My truck always had a haze just before I pulled the injectors in it. Not so much at an idle, but at any load I could see a bit of black coming out of the stacks at all times.
Ahhh well looks like I might be heading in that direction then. When I am driving I get a slight ticking almost like I got to much "timing" on my motor if you know what I mean, but this started about 2weeks ago without touching the smarty.
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Old 01-05-2011, 01:06 PM   #6 (permalink)
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yup, mine just kinda showed up one day and never left (until the new injectors went in).
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