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  #1  
Old 06-23-2010, 01:03 AM
Stewartforever Stewartforever is offline
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Default New inj pump, now lift pump does'nt work

I just installed a rebuilt vp44 injector pump on my 1998 1/2 cummins equipped dodge. It's an automatic tranny. I removed the old injector pump and also removed the fuel filter and cleaned out the water separator. I installed the new injector pump and also a new fuel filter. I did plug back in the connector to the injector pump, the throttle position sensor, and the water sensor in the separator. Now when I key the ignition the lift pump in the tank does not turn on. I looked through the book that I have ( which is'nt very good ) and it said a dark green wire with a black trace was the lead for the fuel pump. I found a dark green wire in the loom under the truck but found now voltage when the ignition was keyed. Any help would be greatly appreciated either a wiring diagram or possible reasons why my lift pump suddenly does'nt work, I was able to drive the truck into the garage but now nada.
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Old 06-25-2010, 04:48 PM
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hemiv8dodgeram1500 hemiv8dodgeram1500 is offline
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i see that this is your first post so hello and welcome, as for your problem i am sorry i cant help you, but i am sure someone here can
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Old 07-27-2010, 12:15 AM
cjames cjames is offline
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im not really the guy to talk to but i do know that on 98-02 24 valve cummins have falty lift pumps that go out and take the vp44 with em.... normally its the lift pump that goes first though.... i guess im suggesting an aftermarket lift pump but i couldnt even tell you for sure if thats the issue as i dont own a 24 valve cummins
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Old 08-27-2010, 11:36 AM
johnny mac johnny mac is offline
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I have a '00 cummins and have been told to watch out for just what cjames was talk'n about. The lift pump goes first and it takes out the injector pump. When you replace what you did does the system need to be primed? Interested in what you find out and good luck.
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Old 08-27-2010, 12:06 PM
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Newer systems are self bleeding but older ones need to be manually bled. I don't recall offhand what year the self bleeding systems began though.
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Old 08-27-2010, 03:43 PM
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Default

If the lift pump was bad and caused the injection pump to go...when you opened up the system and installed the new injection pump, there is no way to get fuel to the injection pump. You said "in tank" pump. Did you perform a TSB to replace the lift pump on the block with the in tank version? I had an 02, so not sure how much a 98 is similar.
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