Fuel pump gone bad? crack the line at the VP44, cycle the truck and see if your getting fuel. That would be my first step.
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Truck Just Died - Fuel Problem(s)?
Hi Guys,
I'm brand new to the forum and have owned my 1999 Dodge 3500 for 8 years now. It's been a great truck and has never let me down until this past Sunday evening as it just unexpectedly died without any warning. (No check engine light on, no loss of power, etc)
The fuel gauge has always seemed to work. It had exactly 1/8 tank of fuel as I was planning on stopping at the next fuel station before it died. I did put 5 gallons in though, thinking that maybe the issue? The engine cranked over fine, all the fuses/relays seem fine but only wants to run on ether.
I'm definitely not a mechanic and luckily until this point haven't had to have any serious work done to the truck nor trust any local auto repair shop to be Cummins experts.
What should I be looking for or expecting first? I really have my fingers crossed that it's something simple...
Thanks in advance for any suggestions/education! Rob
I'm brand new to the forum and have owned my 1999 Dodge 3500 for 8 years now. It's been a great truck and has never let me down until this past Sunday evening as it just unexpectedly died without any warning. (No check engine light on, no loss of power, etc)
The fuel gauge has always seemed to work. It had exactly 1/8 tank of fuel as I was planning on stopping at the next fuel station before it died. I did put 5 gallons in though, thinking that maybe the issue? The engine cranked over fine, all the fuses/relays seem fine but only wants to run on ether.
I'm definitely not a mechanic and luckily until this point haven't had to have any serious work done to the truck nor trust any local auto repair shop to be Cummins experts.
What should I be looking for or expecting first? I really have my fingers crossed that it's something simple...
Thanks in advance for any suggestions/education! Rob
1 - 20 of 22 Posts
Thanks! Very elementary question....what's the best way to check to see if I'm getting fuel? Should I crack the line at the fuel filter housing?Fuel pump gone bad? crack the line at the VP44, cycle the truck and see if your getting fuel. That would be my first step.
2
I would crack it right at the VP. I have an airdog and bypass the stock fuel filter so my lines are blue but its in the same place. It is easier to get to in my opinion then at the fuel filter. The second picture shows it better, where the blue quick connect is on the drivers side.
Loosen the fuel line at the vp-44 injection pump. Bump starter to turn engine over but not start engine. Lift pump will run for 25 seconds. Is there fuel ? If so lift pump is working. Tighten fitting. Next thing to do is loosen fitting at head on #1. Crank engine and watch for fuel. It'll make a mess if the vp is working properly. If there's no or little fuel fuel it'd say you've got a bad vp. But, I'd loosen 3,4 injector lines and have someone crank engine over and tighten fittings as they get fuel. Should start if vp is good. Any codes ? Any gauges ? Stock or aftermarket lift pump?Thanks! Very elementary question....what's the best way to check to see if I'm getting fuel? Should I crack the line at the fuel filter housing?
Thanks guys, I appreciate the help.
No gauges (yet!) and it's the stock/original lift pump. (The truck has 159,000 miles on it.)
No gauges (yet!) and it's the stock/original lift pump. (The truck has 159,000 miles on it.)
If you don't get any fuel at the head. You need to pull codes. Any autoparts stores have cheap scanners and may rent you one for cheap. I've got a harbor freight scanner $50. Check fuel first. Does your lift pump run when the key is bumped ? If not bad lift pump. If so, I'd say bad vp injection pump. Post backThanks guys, I appreciate the help.
No gauges (yet!) and it's the stock/original lift pump. (The truck has 159,000 miles on it.)
There are two required modifications for this generation of truck.
1. Aftermarket lift pump
2. Fuel pressure gauge.
For testing purposes there is a shrader valve on the injection pump where you can attach a test fuel pressure gauge. Lift pump will only operate for around 25 seconds after the starter is bumped. If no fuel pressure, or very low pressure is present replace lift pump with aftermarket FASS. If pressure and fuel is present then pull codes with a scanner. If you don't have the two required mods you will probably be replacing the IP. Request a quote in the vendors section as they sell package deals (IP, LP, FPG)
1. Aftermarket lift pump
2. Fuel pressure gauge.
For testing purposes there is a shrader valve on the injection pump where you can attach a test fuel pressure gauge. Lift pump will only operate for around 25 seconds after the starter is bumped. If no fuel pressure, or very low pressure is present replace lift pump with aftermarket FASS. If pressure and fuel is present then pull codes with a scanner. If you don't have the two required mods you will probably be replacing the IP. Request a quote in the vendors section as they sell package deals (IP, LP, FPG)
If an 00 or before and no codes, it could be the CKP. Don't jump to conclusions. Rule everything else out.
If an 00 or before and no codes, it could be the CKP. Don't jump to conclusions. Rule everything else out.
One of my reasons for asking for error codes. It hopes to rule out other problems.
Thanks Guys, I really do appreciate the help and education!!
Another "elementary" question...what does "CKP" stand for?
Another "elementary" question...what does "CKP" stand for?
I personally like to crack the return line connector (Forward of input) to insure that there is a full VP. Seems to make everything go quicker.
Ed
Ed
Well, it sounds like I've got the worst case scenario that I was afraid of after taking it to a local shop for diagnosis.
The original lifter pump seems to be working as there is fuel getting to the injection pump, but none out of the injection pump. They pulled the following codes:
P1693
P0254 VP44
P1688 Internal Injection
P0251 Fuel Feedback
It certainly sounds like I've got a very expensive repair bill in front of me that I'm not prepared for....considering an investment this big, I want to make darn sure I'm going about it right. Is there a recommended approach as to where to source a replacement pump; or should I have mine rebuilt? (My engine is completely stock and it's my intent to keep it that way.)
Thanks again for all of the eduction!
The original lifter pump seems to be working as there is fuel getting to the injection pump, but none out of the injection pump. They pulled the following codes:
P1693
P0254 VP44
P1688 Internal Injection
P0251 Fuel Feedback
It certainly sounds like I've got a very expensive repair bill in front of me that I'm not prepared for....considering an investment this big, I want to make darn sure I'm going about it right. Is there a recommended approach as to where to source a replacement pump; or should I have mine rebuilt? (My engine is completely stock and it's my intent to keep it that way.)
Thanks again for all of the eduction!
Have you gone through the full priming sequence yet?
Ed
Ed
X2 on this ^^^^Have you gone through the full priming sequence yet?
Ed
Loosen the #1 high pressure line at the head and crank engine over. A helper helps a lot on this. Is there any fuel pouring out ?
Mopar1973Man's Dodge Cummins Articles - P1693 DTC Detected In Companion ModuleWell, it sounds like I've got the worst case scenario that I was afraid of after taking it to a local shop for diagnosis.
The original lifter pump seems to be working as there is fuel getting to the injection pump, but none out of the injection pump. They pulled the following codes:
P1693
P0254 VP44
P1688 Internal Injection
P0251 Fuel Feedback
It certainly sounds like I've got a very expensive repair bill in front of me that I'm not prepared for....considering an investment this big, I want to make darn sure I'm going about it right. Is there a recommended approach as to where to source a replacement pump; or should I have mine rebuilt? (My engine is completely stock and it's my intent to keep it that way.)
Thanks again for all of the eduction!
Mopar1973Man's Dodge Cummins Articles - P0254 VP44 Fuel Valve Current Too High
Mopar1973Man's Dodge Cummins Articles - P1688 Internal Fuel Injection Pump Failure
Mopar1973Man's Dodge Cummins Articles - P0251 VP44 Pump Fuel Valve Feedback Circuit
Sorry to say but that VP44 is brain dead with the 1688 code. There is basically no where to go at that point but replacement.
Still never reported the fuel pressure. It might be ultimately what killed it.
Bluechipdiesel.com they have the best warnty and will take it back if they tell you its the vp44 and thats not the problem.do not get one from pensacola diesel.bad people there.Well, it sounds like I've got the worst case scenario that I was afraid of after taking it to a local shop for diagnosis.
The original lifter pump seems to be working as there is fuel getting to the injection pump, but none out of the injection pump. They pulled the following codes:
P1693
P0254 VP44
P1688 Internal Injection
P0251 Fuel Feedback
It certainly sounds like I've got a very expensive repair bill in front of me that I'm not prepared for....considering an investment this big, I want to make darn sure I'm going about it right. Is there a recommended approach as to where to source a replacement pump; or should I have mine rebuilt? (My engine is completely stock and it's my intent to keep it that way.)
Thanks again for all of the eduction!
I don't know whether or not this is the right thread, but I have a 98.5 24v 5speed with single disk Kevlar clutch, 100h inj. raptor 100gph, and edge evo cts, my truck has this problem where when it gets close to 1/4 of a tank the fuel pressure will drop from 25 to the point to where it almost dies( and has died a couple of times) but if I drain the fuel filter and fill it back up and crank it will start right up, but shorly after it does the same, im stuck idk what it is, and im hating being paranoid it might just start doing it randomly, any thoughts??, any at all would be greatly appreciated!!!!!:confused013:
I don't know whether or not this is the right thread, but I have a 98.5 24v 5speed with single disk Kevlar clutch, 100h inj. raptor 100gph, and edge evo cts, my truck has this problem where when it gets close to 1/4 of a tank the fuel pressure will drop from 25 to the point to where it almost dies( and has died a couple of times) but if I drain the fuel filter and fill it back up and crank it will start right up, but shorly after it does the same, im stuck idk what it is, and im hating being paranoid it might just start doing it randomly, any thoughts??, any at all would be greatly appreciated!!!!!:confused013:
Tipper, you need to start your own thread with CODES,FUEL PRESSURE AT IDLE AND WOT. Stock or aftermarket lift pump ??:thumbsup:
1 - 20 of 22 Posts
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