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loss of power for my cummins

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  #1  
Old 04-12-2008, 01:14 AM
daylight4449
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Default loss of power for my cummins

hi guy's I'm a newby so go easy on me so this is my question hopfulyyou can help i've had my 99 2500 for three years and when I bought it used it had tones of power when the sevice engine light came on I took it to the dealer and they said the injector pump was bad and they replaced it $1500 later. When I got the truck back it had half the power it had before. I had to go to Organ that week from California andI thought the power would come back it need to break in stuped right? so it hasn't been fixxed I just drive it. so times the I hit the gas and the truck hesitates then it slowly takes off. I've been told it is timing but the chilton book says you can't ajust the 24 valve engine so I'm at a loss. and the mileage went from 21 mph to 13,14mph and no smoke out the tale pipe??????
 
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  #2  
Old 04-12-2008, 02:18 AM
finny
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Default RE: loss of power for my cummings

cant help with your problum. but just so you dont get bugged by some of the guys it is cummins not cummings. common mistake. just lettin ya know.
 
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  #3  
Old 04-12-2008, 07:38 AM
SC Willie
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Default RE: loss of power for my cummings

Sounds like a fuel del issue. Start with the basic and look for a colapsed fuel line. Follow them tank to the pump. How is the trottle response with no load on the engine?
 
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Old 04-12-2008, 10:18 AM
Drew
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Default RE: loss of power for my cummings

did the lift pump get replaced. . .sounds like the VP44 may be geting starved a bit.
 
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Old 04-12-2008, 03:00 PM
daylight4449
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Default RE: loss of power for my cummins

thanks for the correction finny. Drew the bill only showed the injector pump and new fuel filter, as for the VP44 what is that don't know much about diesels worked on lots of gas engines only thanks. I did look and I do have the 53 block. SC Willie trased the fuel line and known of it was crushed from tank to the engine it all started after the pump was changed.
 
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  #6  
Old 04-12-2008, 04:28 PM
daylight4449
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Default RE: loss of power for my cummins

hi guys I looked up VP44 it's the injector pump but what would cause it to starve for fuel?
 
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  #7  
Old 04-12-2008, 04:35 PM
behindbars
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Default RE: loss of power for my cummins

The Lift pump. It pumps actually pumps the fuel from the tank up to the injector pump. When it dies it starves the vp44 for fuel (which it uses for lubrication) and it will die too.
 
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Old 04-12-2008, 05:14 PM
daylight4449
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Default RE: loss of power for my cummins

thanks for that I will look at that next and see what the pressure is in the line. thanks
 
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  #9  
Old 04-13-2008, 07:44 PM
CowboyBob
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Default RE: loss of power for my cummins

Did they forget to connect your turbo intake hoses after the VP44 replacement? I know that the elbow has to be removed to replace the injector pump. Maybe one of the boots slipped off and you aren't getting any boost. The#1 sign for fuel starvation is tons of white smoke and you said it isn't smoking at all. Sounds more like a turbo problemthan fuel starvation.
 
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  #10  
Old 04-15-2008, 11:48 PM
daylight4449
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Default RE: loss of power for my cummins

Thanks for the idea it's to late to look tonight I will look tomarrow. That would be great if it was that simple, I'll post the out come tomarrow night.

thanks cowboybob
 
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