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Old August 12th, 2010, 07:09 PM   #1
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Arrow Cummins Stumbling

I just started having an issue with my '01 Ram today. When I am at higher RPM's (2500 RPM +) it starts to stumble like it's running out of fuel even though I have over 3/4 tank. Then every so often it won't want to climb over ~2200 RPM and it will dump out light gray/blueish smoke. I haven't taken a look under the hood yet because it was too hot when I got it home. Any ideas?
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Old August 12th, 2010, 07:22 PM   #2
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when the last time the fuel filters were changed?
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Old August 12th, 2010, 07:36 PM   #3
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Do you have a stock or aftermarket lift pump? Do you have a fuel pressure gauge? If so, what kind of pressure are you reading at idle and WOT? Have you checked for codes using the odometer read out? How old is your VP44?
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Old August 12th, 2010, 08:55 PM   #4
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The fuel filter was replaced a few weeks ago.

Blacklung, you are talking way over my head. I just got the truck a few months ago and it's my first diesel so I don't know much about it. As far as I know it's all stock w/ the silencer ring taken out, BHAF, and a 4" turboback. Please bare with me while I try to answer your questions.

Lift pump, is that the fuel pump?
I don't have a fuel pressure gauge.
There is no check engine light on, so I didn't think there would be codes.
What is a VP44?

Sorry for my ignorance, this is new to me. I would like to learn it though! I was told it could be my injectors. For what it's worth I have just over 90k miles.
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Old August 12th, 2010, 08:58 PM   #5
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lift pump most likely, although that seems like fairly low miles for it to fail from what i have seen. just get a fass and be done with it.
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Old August 12th, 2010, 09:08 PM   #6
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Again, what is a lift pump and/or a FASS?
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Old August 12th, 2010, 09:10 PM   #7
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Try a couple things before you start buying parts.
1. try running with the fuel cap off. if the problem goes away then you tank vent is plugged. just so happens its just a nipple on top of the tank and get packed with mud or have hornets nest in it.

2. Bio guard fuel additive. fuel is an organic and is pron to grow bacteria. it will build up over time and plug your fuel pick simulating a bad lift pump. use the bio additive about once or twice a year to keep the crud out of the fuel.
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Old August 12th, 2010, 09:13 PM   #8
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one if the first things i would do with it is buy a fuel pressure gauge. Here is the thing about that gen dodge. (i know i have a 2001 2500 lol.) They have a lift pump(fuel pump) that feeds the injections pump. The stock one is know to suck ass. The problem is when it goes out it starves the injection pump and burns it up. Insert $2000 now lol. It if install a fuel pressure gauge you will know when the stock lift pump goes out or gets weak saving you lots of money.

I just recently put in a gauge for good measure only to find out that my lift pump was bad. But it is still cheaper then an injection pump. If your lift pump does go bad i highly recommend buying a good aftermarket one.

I got all my stuff from http://www.genosgarage.com/default.asp There were great to deal with and know their shit. Then even helped me walk through installing my new aftermarket pump as the sales man has installed a few of them himself.

If you want to chat more send me a pm with your number and we can talk more.
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Old August 12th, 2010, 09:14 PM   #9
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Quote:
Originally Posted by LuckyCharm4x4 View Post
Again, what is a lift pump and/or a FASS?
FASS is a brand of pump. it is the same kind i put in mine.
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Old August 12th, 2010, 09:18 PM   #10
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www.cumminsforum.com

Youll get more help there rather then this website. my username on there is M5B6L

To add to the help you have already gotten. Dont get a fass, get an airdog aka pureflow diesel.com (life time warrenty and cheaper). And get a fuel pressure ( 0-30psi), boost psi and exhaust temp gauge when you do get that installed. Most likely your vp is on its last leg. Check for codes my turning your key forward before start position and off 3 times. Your odometer will flash and give off a few P_ _ _ codes.

Do you have any programmer or chip on the truck? or did the previous owner?

Last edited by M5B6L; August 12th, 2010 at 09:38 PM.
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Old August 12th, 2010, 09:57 PM   #11
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Quote:
Originally Posted by LuckyCharm4x4 View Post
The fuel filter was replaced a few weeks ago.

Blacklung, you are talking way over my head. I just got the truck a few months ago and it's my first diesel so I don't know much about it. As far as I know it's all stock w/ the silencer ring taken out, BHAF, and a 4" turboback. Please bare with me while I try to answer your questions.

Lift pump, is that the fuel pump?
I don't have a fuel pressure gauge.
There is no check engine light on, so I didn't think there would be codes.
What is a VP44?

Sorry for my ignorance, this is new to me. I would like to learn it though! I was told it could be my injectors. For what it's worth I have just over 90k miles.
On '00-'02 trucks, you can check for codes using the odometer display. Cycle your key three times from off to on within five seconds. The odometer screen should first flash P PCU. If there are any codes present, they will proceed to show up in the format of P####, where the number signs will represent the DTC code(s) present. Write down any codes present. After the PCU error codes are finished or if no PCU codes are present, the display will read P DONE. Next the screen will read E ECU and display any present P ECU codes in the same P#### format. Once again, write down any present codes. After the P ECU codes are finished, the screen will again read P DONE and the mileage on your odometer should reappear. Not all codes will always illuminate the check engine light.

A lift pump is a fuel pump that feeds fuel to your VP44, which is your injection pump. The lift pumps on the 24v are prone to failure, just as the VP44 is. When the lift pump dies, the diaphragm and/or rotor in the VP44 can seize up due to lack of lubrication provided by diesel fuel. It is best to run an aftermarket FASS or Airdog lift pump due to the reliability and ability to supply constant and proper fuel pressure. But even with a better aftermarket lift pump, a VP44 can still go bad due to electronic failures. However, a better lift pump will still improve the reliability of your injection pump.

Last edited by Blacklung; August 12th, 2010 at 10:08 PM.
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Old August 12th, 2010, 10:24 PM   #12
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Codes:
P PCU - P 1693
P ECU - P 0230
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Old August 12th, 2010, 11:52 PM   #13
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Quote:
Originally Posted by LuckyCharm4x4 View Post
Codes:
P PCU - P 1693
P ECU - P 0230
P 1693: DTC Detected In The Companion Module.

This code is a companion code and basically just means that there are other codes present.

P 0230: Transfer Pump (Lift Pump) Circuit Out of Range.

I would check the connection to the lift pump and test for power. You're going to have to bump the starter to get the pump to run. If you have power at the connection, the problem is most likely your lift pump. This is where a fuel pressure gauge would come in handy.
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Old August 13th, 2010, 09:30 AM   #14
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The lift pump is not located in-tank is it? If not where is it?

How can I get the other codes read? Is there a place that is pretty good with diesels in/near Kalamazoo?
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Old August 13th, 2010, 10:00 AM   #15
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Bry, there is a newer diesel repair shop in town, my uncle took his ford there and they treated him fair, seem to be knowledgable...anyways it i think its called c and c repair, located on Kilgore and 29th street(accross from Carlton equipment)....check it out let me know.
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Old August 13th, 2010, 10:02 AM   #16
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I just remembered, I think I have one of these fuel pressure gauges laying around somewhere. Will that help at all?

http://www.harborfreight.com/fuel-in...ter-92699.html
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Old August 13th, 2010, 10:04 AM   #17
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Quote:
Originally Posted by jsmtam90 View Post
Bry, there is a newer diesel repair shop in town, my uncle took his ford there and they treated him fair, seem to be knowledgable...anyways it i think its called c and c repair, located on Kilgore and 29th street(accross from Carlton equipment)....check it out let me know.
Cool thanks, I'll check them out!
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Old August 14th, 2010, 11:47 AM   #18
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Quote:
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The lift pump is not located in-tank is it? If not where is it?

How can I get the other codes read? Is there a place that is pretty good with diesels in/near Kalamazoo?
its attached to the driver side of the engine next to your fuel filter housing. little r2d2 looking thing.

but while your at it save up for an airdog 100 or 150. there $499 everywhere you look and will save you alot of money down the road.

DO NOT REPLACE YOUR LIFT PUMP WITH ANOTHER OEM UNIT!!
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Old August 14th, 2010, 08:49 PM   #19
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Quote:
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DO NOT REPLACE YOUR LIFT PUMP WITH ANOTHER OEM UNIT!!
I agree if i remember correctly this is the one i got
http://www.genosgarage.com/prodinfo....SS_F0_D03_095G
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Old August 14th, 2010, 09:19 PM   #20
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I took it to C&C Truck and my pump did go bad. He said that I should replace it with a Raptor, which is about $400 anywhere. They have a lifetime warranty and are apparently a really good unit, Anyone hear anything about these?
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