5.9 Liter CR Dodge Cummins 03-07 Discussion of 5.9 Liter Dodge Cummins Diesels with Common Rail Injection

loss of power? ????????

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Old 10-10-2011, 04:05 PM
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Default loss of power? ????????

Ok hope I can explain this correctly. Under normal acceleration my truck seems like she has plenty of power, but under hard acceleration or under load she seems as if she is not getting enough fuel? My boost levels go up normal but It seems like I get no added power? Maybe I have a crack in a boost hose? My first thought was lift pump though, could be way off though. Thanks in advance for any help!
 
  #2  
Old 10-10-2011, 06:28 PM
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weak lift pump, weak injectors, valves out of adjustment, etc, etc.

Are you using or gaining oil? Are you getting blow-by? Any codes?
 
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Old 10-10-2011, 07:56 PM
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Im dealing with the same thing under hard acceleration when i go into 4th it seems to die off after 2100 rpm, but lower gears i have more power there been thinking lift pump too. no codes, replacing the fuel filter this weekend. and no loss of oil or gain either
 
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Old 10-10-2011, 11:23 PM
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Originally Posted by CreeperSleeper View Post
weak lift pump, weak injectors, valves out of adjustment, etc, etc.

Are you using or gaining oil? Are you getting blow-by? Any codes?
CreeperSleeper,
I just had my injectors replaced, oil levels are normal, no codes.
How could I tell blow-by, SMOKE?

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Originally Posted by s10driver85 View Post
Im dealing with the same thing under hard acceleration when i go into 4th it seems to die off after 2100 rpm, but lower gears i have more power there been thinking lift pump too. no codes, replacing the fuel filter this weekend. and no loss of oil or gain either
I'm gonna take mine in tomorrow, to have it checked out. I've
been finally found a really good diesel shop! They've never steered me wrong. I'll keep you posted and let you know how it turns out.
 

Last edited by MurphyStrut; 10-10-2011 at 11:23 PM. Reason: Automerged Doublepost
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Old 10-18-2011, 09:48 PM
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Ok, life has got in the way so I haven't been able take my truck in. Is there any other ideas you guys have on maybe figuring this thing out myself. I appreciate any help!
 
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Old 10-19-2011, 08:34 AM
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put a rail pressure guage on it! Sounds like your draining the rail!
 
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Old 10-19-2011, 10:46 PM
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I have a rail gauge, but don't really know what pressures are good/bad?

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That sounds bad, but never really thought about it until I noticed some power loss
 

Last edited by MurphyStrut; 10-19-2011 at 10:46 PM. Reason: Automerged Doublepost
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Old 10-20-2011, 10:35 PM
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If your floored watch the guage as you lose power does it stay around 25k or drop down to 15 or less? under normal driving around 20 is normal 800 for idle give or take a few!
 
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Old 10-20-2011, 11:54 PM
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correct me if im wrong but wouldnt the ecm pick up on a low reading, i thought that it was monitered and a check engine light would through off. but i have never trusted the dang things anyways.
 
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Old 10-21-2011, 12:09 AM
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Thanks dangerous, will do some driving this weekend to check out pressures.

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S10, I wish it would throw a code so I wouldn't have to troubleshoot so much
 

Last edited by MurphyStrut; 10-21-2011 at 12:09 AM. Reason: Automerged Doublepost

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