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

Lift pump question??

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  #1  
Old 07-17-2011, 07:44 PM
Billy D's Avatar
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Default Lift pump question??

My 95 does not seem to start nearly as fast as my 90, or my 02. It runs great, it just cranks a couple of seconds before starting, seems like forever. What can I look for, i'm not real familiar with the 2nd gen 12V's, could the LP be going south?? Is there a way to check my fuel pressure without a gauge, like on my VP? Is there anything else I should be looking for? Thank you as always for your info, I appreciate it all!!
 
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Old 07-17-2011, 08:35 PM
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I have noticed the cranking speeds up when I bump timing.

yours could be loosing prime and that has to deal with the lines from fuel tank and back
 
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Billy D (07-18-2011)
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Old 07-17-2011, 09:28 PM
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What is your idle speed? Mine would take a couple seconds to fire up unless I hit the throttle just a bit as I was cranking. I realized it was idling around 600 rpm in park with the A/C off. I bumped it up to 750 and that helped a lot. It still starts the fastest when I lightly blip the throttle though.
 
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Old 07-18-2011, 07:10 AM
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The blip of the pedal is the key, fired right up! Thank you!

---AutoMerged DoublePost---

My idle speed is at 600, and the fuel lines are new. Thank you again gentleman, I appreciate it!
 

Last edited by Billy D; 07-18-2011 at 07:10 AM. Reason: Automerged Doublepost
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