VP Toast?
 

Hey guys,just went to hook up to a trailer over in Portland OR...fired the truck up,everything was as should be,happy rattle of my little cummins...pulled forward and and clutched out to put it in reverse and when it dropped to an idle it almost died,and ran like it does when you first bleed the air out,you know...one,maybe 2 random cylinders.

That sound like a VP problem to anyone else?

Got the thing to restart that way once,and it ran for a couple minutes till I shut it off...

So,what you guys think?:argh:

With the VP any symptom is possible but lack of power is not one of the more common ones unless it's accompanied by other things. It is an advanced symptom. Typically by the time you get to lost power you have already noticed a steep dive in your fuel mileage and the not starting when hot has already been an issue.

Normally I'd ask about fuel pressure but I just read your other post about holding 15psi so that's not an issue, that also rules out the LP as the problem. So the only other thing I can think of is bad fuel. drain some fuel off in a jar and let it sit for a few minutes to see if any water seperates out. Don't forget to check codes on it also just to see what pops up.

After all of this I would move onto the sensors next. Pull, check and clean them to see what happens.

Sounds like the cam pos sens on my 01 It just all the sudden turned off, then fired ran like crap and turned off get it scaned the part was like 80 bucks and not crazy hard to replace

I bet on cam sensor too...........pull the codes dude

Crank sensor maybe? I've got a 2000 engine in mine,so it's got the Crank sensor.
Thanks for getting back to me guys,the other sites would not give me a guess unless I gave them a code,heck if I had a code I could look and see what it said...lol
Made me wanna bite some noses!

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I have noticed a pretty good drop in fuel milage,not all the time,but sometimes.-2or3 mpg
and have had it fail to start,you know when you turn it over nearly enough to start it?
then look goofy and start it all the way?:humm:
Not what I'd call "hard" to start though,just about 1 rev more than I usually use.

With the hard to start issue the truck will fire right up no problem first thing in the morning or after it's sat long enough to completely cool the pump off. But if you shut the truck off it won't restart for hours, period unless you douse it in cold water to cool it off.

I would deffinately look at the VP last though since it's 20 times the price of any other things you could check out first.

Okay,I've got the VP off my old engine,will a "HO" Injection pump work on a "SO" engine do ya think?
I'll check the other things that I can first,not sure what I can check,but I guess I can try the Crank sensor,if I can find one in short order.

Hav you checked the codes on your on board diagnostic system yet.

If you pull the sensor you can check it with an Ohmmeter to see if its still good, no need to throw parts at it if it's still good. Whitmore posted a guide in here someplace on what the readings should be and how to check all of the sensors, I'll just have to find it.

IAT Sensor: https://www.dieselbombers.com/24-val...or-sensor.html

CPS Sensor: https://www.dieselbombers.com/24-val...on-sensor.html

MAP Sensor: https://www.dieselbombers.com/5-9l-2...-pressure.html

Okay,now does anyone know if the HO pump I've got will work well on the SO engine I have in the truck now?

I'm not the expert here but from past reading on the sites I would say no. They make the HO pump that will run an SO truck, it's the HRVP but it's an HO pump that has been modified just for running on the SO truck.

+1 to that.

I haven't heard of such until recently. We had a guy here at work whose truck exhibited those same symptoms and it was in fact the VP dying.

I have to also agree with Bubba that I'd certainly spend some time checking out everything else. It won't be that much extra work, and may pay big divedends.

I can dig it,just that it's clear over in Portland,and I'm trying to see all the angles on this,just in case,I'll check the Crank position sensor,and see if I can find any leaks into the fuel system,though I doubt it....sounds like I better plan on putting Ol' Blue up on the trailer again:baby::baby::baby:

Maybe it's time to ppump this P.O.S. and be done with it.

Doin that would only be the start of a whole new nightmare.

If you have another pump sittin handy I would also suggest grabbin the pressure regulator fitting off of it, the outgoing fuel banjo bolt and trying it on the bad truck. If that little thing goes bad it causes all sorts of issues that lead folks to replace VP's that are perfectly good.

Prolly be cheaper to sling a commonrail in her.

haha,thats a joke right?
I'm thinking even with a core I can get a p7100 for about $745+300 core Pensacola Diesel Inc. - DODGE/CUMMINS :: FUEL INJECTION PUMPS
then theres a "kit" with the timing case ect.PERFORMANCE PRODUCTS
then a little diggin around for this and that.
Talk me out of it if it's an awful idea,or theres alot more to it that I don't know about.

The worse part of the P-Pump is that you lose the adjustability of the 24V. It is either turned up or down and not adjustable with a button. With pollution control issues becoming more improtant everyday this could have a major impact in the very near future. The next problem is getting in tuned in once it's all installed. The install is the quick and easy part.

Is it still difficult to tune if I'm not looking for lots of power?
Heck I'd be happy to get like 300hp to the ground and whatever I could for mileage.
If you talk me out of it it would be alot cheaper now,just trying to make this thing more reliable.

A little issue I ran into travelin with my truck and since your talkin about a travel trailer I assume you travel with yours. I'm on the road, 1000 plus miles from home and my trucks sittin dead on the road. I had it towed to a cummins shop. They pulled it in the bay and crawled under it, came out and said what do you want us to do with this. I said fix it I hope. We can't fix anything on this it's all aftermarket stuff that we can't work on. The only way they could work on it would be to pull all my fueling system out and replace it with stock. Now mind you I just got towed off the top of a mountain in a snowstorm at Lake Tahoe California. Not exactly the cheapest place to be in the middle of ski season.

I had no tools with me and no shops would work on a modified truck. What do you do.
In my case I went to the local TrueValue and bought a pair of pliers and a small wrench set, pulled out an ironing board that just happened to be in the trailer I was pulling and used it to lay on under the truck so I was out of the snow and I went to work in sub zero temps and fixed it as best I could.

This is the problem with heavily modified trucks if you travel away from home in them or if you don't know how to fix them yourself. Just a personal experiance.

That's a great point,I never pay to have someone else work on my truck,every time I've done that it costs me more than I'd like to spend.
Example, I swapped those engines in a gravel driveway in less hours than I was billed for at the place that I had #6 replaced. (that's pull two engines,install one)

You do make sense,if I do this I WILL be working on my own truck,I like working on my own,just when the VP goes down then I'm done,till I get another one ordered,or hunt one up locally.

Really though,talk me out of it!

1693 the only code I got....grrr

A long shot is to check the grounds for the VP and hope one is not makin good contact, that has been known to be the case a time or tow and throw that code, but not common. After that it already sounds like you know whats next.

This where the sounding of Taps commences.

Hauled a$$ down to autozone,got the free readout......0234....1688
Hand me that bugle...:w2:

Well,got the New VP on,and she runs fantastic,even Pwned a little ricer on the way home!
The song of the 5.9 is back on the jukebox,man I sure missed my straight pipe! :U:

You always hate when these things are sick, but when you get it fixxed it's almost like make up sex. It's ohhh so good to hear em purr again. Congrats dude.