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24 Valve 2nd Gen Dodge Cummins 98.5-02 Discussion of 24 Valve 5.9 Liter Dodge Cummins Diesels with VP44 Injection Pumps

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my truck shut down on my while accelerating today. it just lost power and started choking real bad and blowing white or grey smoke i realy couldn't tell. i pulled off and shut it down and tried bleedin the lines witch then it started seemed ... JOIN NOW TO REMOVE TRACER

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  #1  
Old 10-26-2010, 07:03 PM
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Default white grey smoke??

my truck shut down on my while accelerating today. it just lost power and started choking real bad and blowing white or grey smoke i realy couldn't tell. i pulled off and shut it down and tried bleedin the lines witch then it started seemed like it had some power left in it then died out. so i left the lines cracked and it actualy ran better but still sputtered at around 2000 rpm and blowin smoke all the while. im not sure whats going on for sure. im hoping headgasket but thought id ask around here before i jump the gun.
aftermarket is biger turbo and intake stock lift pump + holly blue electric pump(on the same line) and 4 inch turbo back exhuast.
any help is apreciated! thanks
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  #2  
Old 10-26-2010, 07:07 PM
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scan for codes? id say youve either got a dying vp or a bad fuel filter to start with

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Old 10-26-2010, 07:37 PM
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no codes come up. well other then the one that i ben running with for the last 2 months about low map. or low boost press in otherwards

---AutoMerged DoublePost---

update: just pulled her in the shop and it will start and run for a minute or so but runs realy bad and sputers alot. then dies. and then i let the fuel pumps build up fuel again takes a looooong time witch isn't normal. like 30 or even 40 seconds. then if i crank enough it starts back up again and runs a bit and dies again...any thoughts?

Last edited by 01_cummins; 10-26-2010 at 07:37 PM.. Reason: Automerged Doublepost
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Old 10-26-2010, 08:02 PM
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Well I think it sounds like you're definitely going to need to get a new lift pump. The holleys aren't made to push diesel from what I've heard. Not sure on the white/gray smoke though. I know the powerstrokes tend to smoke white and not have any power when the injectors go bad, but I don't know if it could be that on a Cummins. Are you losing any coolant? Because that would typically indicate a head gasket. Or even water in the oil could be an indication of a headgasket.

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Last edited by GuyWithA24Valve; 10-26-2010 at 08:09 PM..
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Old 10-26-2010, 08:05 PM
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Get a fuel pressure gauge, or at least a light. Unfortunately, you NEED to bite the bullet and get a good lift pump.
Not having a fuel pressure gauge is asking for a bill for a VP44.
Sorry about your luck.

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Old 10-26-2010, 08:10 PM
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yea...sounds like your lift pump might be weak and having to catch up which it isnt able to. the white smoke to sounds like a lack of fuel. when you have too much you get thick black smoke in turn is unburned fuel. the white smoke is usually a lack of fuel. i would def check your filter as well. you could have a clogged filter also if it hasnt been changed in a while and you have ran some diesel with any particulate.
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Old 10-26-2010, 08:16 PM
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get at least a temporary FP gauge to see where your at. may just need a new bypass valve.

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Old 10-26-2010, 11:06 PM
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well i spent the last couple hrs tearin into it. found the stock lift pump was fighting with the holly (the electric black and blue are both for diesel FYI) witch was not funtcioning whatsoever and just couldn't cut it then the engine was sucking oil past my rings into the engine and trying to run off of that. suprisingly the thing still runs fine...ive rewired half the fuel electronics and got the kinks out now but it would be handy to know if they make a fuel line split so i can just choose to bypass my holly sometimes then i could just run a toggle to my cab and shut it off it this occurs again. does anybody know of somthing like this? im thinkin a split and ball valve with a manual valve...any ideas?
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Old 10-27-2010, 08:16 AM
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the engine was sucking oil past my rings into the engine and trying to run off of that
I kinda doubt that. Your rings would have to be screwed for that to happen. It's not possible that enough vacuum was created in your cylinder to "suck" oil past your rings. Especially with a forced induction engine, and an inlet valve open.

In regards to the split, solenoids, toggle switches...... I retain my opinion about biting the bullet. I ran 2 pumps in series for a while as well. It was a band-aid until my real lift pump showed up.
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Old 10-27-2010, 08:38 AM
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Originally Posted by RAWilliams View Post
I kinda doubt that. Your rings would have to be screwed for that to happen. It's not possible that enough vacuum was created in your cylinder to "suck" oil past your rings. Especially with a forced induction engine, and an inlet valve open.

In regards to the split, solenoids, toggle switches...... I retain my opinion about biting the bullet. I ran 2 pumps in series for a while as well. It was a band-aid until my real lift pump showed up.
AGREE! a VP truck NEEDS to know & prevent low fuel pressure because that will kill it. ditch the factory LP 100% and solder/seal the wires to an LP near the tank that can supply 15-20psi without question.
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