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loss of power for my cummins

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  #1  
Old 04-12-2008, 01:14 AM
daylight4449 daylight4449 is offline
 
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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 finny is offline
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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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Old 04-12-2008, 07:38 AM
SC Willie SC Willie is offline
 
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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 Drew is offline
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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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  #5  
Old 04-12-2008, 03:00 PM
daylight4449 daylight4449 is offline
 
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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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Old 04-12-2008, 04:28 PM
daylight4449 daylight4449 is offline
 
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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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Old 04-12-2008, 04:35 PM
behindbars behindbars is offline
 
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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 daylight4449 is offline
 
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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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Old 04-13-2008, 07:44 PM
CowboyBob CowboyBob is offline
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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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Old 04-15-2008, 11:48 PM
daylight4449 daylight4449 is offline
 
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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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Old 04-16-2008, 11:06 PM
daylight4449 daylight4449 is offline
 
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Default RE: loss of power for my cummins

all the hoses from the turbo to the intercoolerto the engine are on and tite it's got to be the lift pump. that will have to what a couple week to get thanks everyone.
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Old 04-17-2008, 08:40 AM
mopar1973man mopar1973man is offline
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Default RE: loss of power for my cummins

Here is the daignostics for the lift pump...
http://mopar.mopar1973man.com/2002%2...ift%20pump.htm

MINIMUM PRESSURE REQUIRED 10 PSI
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  #13  
Old 04-18-2008, 12:53 AM
daylight4449 daylight4449 is offline
 
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Default RE: loss of power for my cummins

thanks for the info that will be very useful I will try to test the pump this weekend.
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Old 04-29-2008, 10:02 PM
ThunderRam ThunderRam is offline
 
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Default RE: loss of power for my cummins

I have the same problem. As soon as I replaced the injector pump I lost 3mpg and power. I still have not found the problem. I had the lift pump replaced with a pump that was mounted on the rail close as possible to the tank.
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Old 05-04-2008, 01:32 AM
daylight4449 daylight4449 is offline
 
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Default RE: loss of power for my cummins

Hi thunder ram the loss of power is madding the truck was bone stalk when I got it except for the bully dog that was on it. When it went to the dealer I took off the bully dog that was on it. When it came home from the dealer it was bad thenI put it back on and it was driveable. even with the bad pump it had a ton more power, I can't cheap the tires either.I am short a little money write know so I haven't had the chance to buy the fuel pressure gauge to test the lift pump pressure. It sound like it didn't work on your truck. I got to read your thread and I think I'm going to take it to ashop so andi'llgetback to you with the answer. I have to get it done before the next holiday. let me know if you find out anything.

thanks
Matt
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Old 05-21-2008, 09:43 AM
ThunderRam ThunderRam is offline
 
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Default RE: loss of power for my cummins

Thanks Matt, Still haven't found the problem. I had the fuel pressure checked and it's fine. I can't believe the lack of power. My 5.9 V8 had more power. You would think having 4.11 gear thats it would pull a hill in OD without shifting down. What's worst is the fuel mileage that dropped too. Junk injector pump I guess.
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Old 07-18-2009, 04:11 AM
daylight daylight is offline
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we'll here we are two years later and the problem has been fixxed and it was simple one day last week I started messing with the wiring for the injector pump and looked it over didn't see anything wrong so put it back on took the truck for a spin and it ran like a rapped ape the plug wasn't all the way in or one of the wires had a bad conection it runs great and has it's fuel milleage back love my truck.
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Old 07-24-2009, 08:46 PM
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garrettg84 garrettg84 is offline
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Daylight, just curious, were the RPMs kicking up when you mashed the pedal and you just weren't moving or did the engine not kick up?

I have a similar problem with my truck still, its been going on for some time now. But mine only happens after I go over 50mph. Slowing down to a stop and then accelerating again is like i'm pulling a 30 thousand pound trailer. The rpms are up high and the truck just slowly starts to move.

For me though, i can fix it by turning the truck off then back on again. Strange.
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Old 07-24-2009, 08:46 PM
 
 
 
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05, 1999, 2001, 2004, 2005, 59, cummins, daylight4449, dodge, engine, fuel, hills, loss, power, pressure, ram, show, slows, smoke

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