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Dodge Ram Cummins Diesel Questions

KCRamKCRam Mt. Arlington NJPosts: 3,516
This is the place for questions and comments about the Cummins-powered Dodge Ram trucks!

kcram - Pickups Host


  • i own a 1994 dodge ram 2500 2x4 with a 5.9 cummins diesel. When the truck is not used it is pluged in.If i let it sit for an hour or even a day or two it is very hard to start.When we do get it started it runs fine for the rest of the day but then at 4 oclock when it is time to go home here we go again it is very hard to start.i have checked the fuel with the right gages and i am getting fuel pressure around 21 psi. It will start if i spray alittle starting fluid in it and i mean alittle just a flick it starts right up and runs fine.Yes it does smoke alitle white no to much but that goes away in about 1 min or so. is it or could it be the fuel heater relay or could it be the fuel shut off solenoid relay.
  • I have an '06 dodge 2500 with a 5.9-Liter HO Cummins Turbo Diesel Engine. When I turn the key on but before I crank the engine, I notice that the check engine light starts to blink after 10 seconds. The check engine lights turns off once the truck is started however. In the manual, it states that there may be a problem with the emissions testing and may affect my gas mileage. My dealership cannot find a solution to this problem. Any help or suggestions is welcomed.
  • france1france1 Posts: 1
    I had the same occurence in my Ram 2500 cummins once and it never did it again. Ever since I have had the truck since day 1, it has an intermittent problem with cranking and cranking to get it to start not only in cold temps but in the hot as well, once it starts its fine but if it sits for about 5 hours its hard as heck to start. I have taken it in to Dodge 3 times and I am constantly told, "we cant find anything wrong" and that cummins is working on a fix" If anyone has had the same problem and know of a solution could you please email me at [email protected] Thank you
  • KCRamKCRam Mt. Arlington NJPosts: 3,516
    As stated right in the post box, please do NOT include your email address in your messages. If you wish your email address to be seen by other members, make it "public" in your profile.

    kcram - Pickups Host
  • I'm scheduled to take it in to get looked at this Friday. Hopefully I'll find something out. I'll send you an update if anything worthwhile comes of it.
  • dalejdalej Posts: 3
    Minor (very slight) fuel leaks in fittings can cause air to enter the fuel lines causing the fuel injection pump to loose prime. Then when you go to start it, it is sucking air into the line at the leak causing difficulty getting the prime back. Put clean cardboard under the vehickle when you park it for the night and look for fuel spots on it the following morning. You may be able to spot where the fuel is leaking and tighten up a loose fitting or replace an "o" ring. Might just solve your problem.
  • gaboisegaboise Posts: 8
    The twelve valve trucks have a problem with aging flexible supply and return fuel lines. They deteriorate and, even though they may seem to be sound, they often bleed air and are subject to losing prime. It is rather simple to replace them but it is not easy to do. The lines are difficult to access. If you are handy you can do it yourself if you don't mind a bunch of skinned patches on your hands caused by reaching into these hard to reach places. One line is 3/8", the other is 5/16". As long as you're doing it use marine grade line. It doesn't cost a terrible bunch but is less subject to the above mentioned loss of prime.
  • mjsheekmjsheek Posts: 3
    Has anyone else had a problem with their 05 diesels not starting and stalling, The no start doesn't matter if it has been running all day or been sitting for a week when it chooses not to start it just does'nt want to start. The stalling is you'll shift gears in the manuals and its just like you turn the key off, It will not start back till you cycle the ignition off and back on again. If you have please email me and let me know. Its not fun when it stalls in the middle of a sharp curve.
  • I have a manual shifter and I was wondering with computerized fuel injection how much fuel is being used when truck is coasting down a long hill with foot off the throttle? Would less fuel be used if truck was in neutral?
  • thawkesthawkes Posts: 1
    I also have an 05 diesel that is hard to start at times. This has happened since the day I drove it off of the lot (brand new), and recently took it to my local dealer service dept. (different state) to find out what the problem was. They informed me that five out of the six injectors are bad (apparently due to metal from contaminated fuel). They said that Dodge had changed the injectors for the 05's, which explains why none of my previous Dodges had this problem. They also informed me that this is not covered under warranty, and it will cost me $4,500 to have it fixed. I'm not buying their statements, in large due to the fact that it was hard to start the very first time I got in it. Even if their statements are correct, wouldn't this problem be considered a manufacturer defect with consideration to the change in injectors? I'm not exactly sure how their "new and improved" parts getting clogged by the same old type of diesel fuel is the fault of the consumer.
    As far as the stalling, I've experienced no problems due to the fault of the truck, only driver error!
  • p100p100 Posts: 1,116
    This makes no sense. First of all, if there is powdered metal or other particulates in the fuel, aren't fuel filter(s) supposed to catch these contaminants? Have they increased the capacity/number of fuel filters, as well as filtration efficiency of these filters? If these new injectors have smaller orifices and are so sensitive to contamination, then the truck should have at lest three in line fuel filters/water separators. A lot cheaper to replace these than $ 4,500 worth of injectors. And why can't these new injectors be disassembled and cleaned for a lot less money? All traditional diesel injectors that I am familiar with (have two older diesel vehicles myself) can be rebuilt. A set of 5 rebuilt diesel injectors for my Mercedes 300SD costs about $ 300.

    The more I read about issues like this, the more convinced I get that I need to stay away from new diesels. I love to have one, and prices are actually pretty good now, but I do not need this kind of a headache. You can buy a lot of gas for $ 4,500, so the same truck with a Hemi 5.7 might be a lot more economical for occassional towing. And you save $ 5,555 up front too.
  • I had a new 2006 2500 MegaCab with 5.9L Cummins home from a dealership on a borrow for a day and a half a week ago and it did this. And then I went and bought one from another dealership a day or two later and it does the same thing. (Had some issues with the desk manager telling me things I knew not to be true on financing rates/payments -- I had tables calculated I had brought with me.)

    You put the key in and turn it to power up the electrical system and after a few sec the orange engine icon starts blinking but it goes away when you start up the engine... 2 out of 2 brand new off the lot doing this...
  • danny52danny52 Posts: 4
    My 04 Cummins has a slight ticking noise. The dealer listened to it and said it is a sticky injector. This is an ongoing problem according to them - and they've had to completely replace 6 motors after the sticking became so bad it jammed open and melted a hole in the piston. They are going to fix it under warranty (truck has 16K on it), but my question is this: Does this affect the long term longevity of my motor? If the injector is leaking more fuel into the cylinder than needed it would seem like there could be a number of serious problems. The dealer says one way to diagnose the problem is that fuel ends up in the crankcase - which has not happened yet in this case. Any experience out there with this type of situation?
  • Check the Amps that your batteries are putting out, That could couse the heating blower not to heat the engine.
  • I am having more extreme problems, twice in 8 months I have had a complete injector failure. The only immediate symptom is a howling noise followed by a flood of oil coming out the breather and compltely covering my trailer. After the last tow and 11 days in the shop the dealer still has no definate answer for me. A buddy is telling me that this has happened to him 7 times on his truck of the same year (04).
  • Thanks chris65w, I appreciate the info. Sorry to hear of your problems. It cant be any fun. The ironic part of all this is that my Dodge replaces my 2000 Ford PS. I was going to get another Ford (with the 6.0 diesel). My buddy at the local Ford parts department told me not to because of chronic injector failure. Who makes injectors anyway? Is it 3rd party? It would seem like a no brainer to get them right since failure is so expensive. I'm told a new Cummins is $15K installed. I wish you luck. I should get my truck back today. I'll post the results.
  • I got my truck back from the shop today. After doing flow tests and other diagnostics, the dealer came to the conclusion that all I needed was a valve adjustment. So that was done (under warranty), and I'm on my way. The injectors were not bad - as was originally thought. I'm a happy camper.
  • This 5.9L diesel dies when I stop unless I hold the brake with one foot and the accelerator with the other. It dies in reverse also and especially if the A/C is on.

    I have looked for leaks but none are visible.

  • KCRamKCRam Mt. Arlington NJPosts: 3,516
    Check your throttle cable. There was a recall for this years ago. The original cable would begin to fray and would cause the exact problem you describe. The new cable is coated/wrapped and solves this problem. I had this issue on my 96 Cummins - replaced the cable in 1999 and all was well again. The recall came in 2001, and DaimlerChrysler paid me back in full for the repair when I submitted a copy of the receipt.

    kcram - Pickups Host
  • I am new diesel owner and was told by atleast five different diesel drivers that our truck had a "knocking noise" We took it in after a random stranger told us they heard knocking. Dealership said it was normal. Took it back again and had them do a side by side with another truck. Master mechanic came out and said that there was definately something wrong. Called us a week later and said nothing was wrong. Took it back in after the noise became excessive. They said it needed a new cp3 pump? and some adjustments. Replaced those things and it is still making noise. Now they are saying it needs a new cam? I am not mechanically inclined, and I feel like these people are giving me the run around...they have had the truck this time around for ten days and have yet to fix the problem. Anyone a mechanic? Can you tell me if this dealership is full of it?
  • aok2aok2 Posts: 1
    2000 cummins 3500 replaced fuel pump truck turns 0ver fine will pull start will not start with starter engaged even though turns over normal could ignition be culprit
  • i have two 04 dodge 3500 both run the same fuel out of my bulk tank one truck runs fine the other blows a blue/white smoke after it idles. dodge says bad fuel but they found no water in the filter or tank no codes i had fuel tested at a lab (fuel fine)dodge is lost can someone help?
  • KCRamKCRam Mt. Arlington NJPosts: 3,516
    Blue smoke is caused by motor oil entering the combustion chamber. You likely have one of three issues with the smoking truck:
    - low compression at one cylinder
    - worn piston rings
    - leaking valve stem seals

    If your Dodge dealer isn't helpful, a Cummins shop should be able to diagnose this pretty quickly.

    kcram - Pickups Host
  • dodge tested all these items and all tested fine its more of a white smoke than a blue they also looked at turbo seals but what about air cooler?
  • If you haven't had the recall done arrange it with your dealer.
    I have performed this recall and well the cable can fray and break that isn't your problem. Likely your idle speed is too low. It's adjusted manually on the pre 24 valve cummins engine. It should be about 750rpm in drive with the A/C on if I remember correctly.
    It's proper procedure to check and adjust the idle speed while performing the recall so thats likely why it also fixed your condition kcram.
  • cruz98cruz98 Posts: 1
    green guy to the diesel world and lovin them, I own a 98 cummins, starter not cranking all of a sudden, solenoid is clicking, but that's all she wrote. Just wondering if my pinion is jammed in the flywheel or is my starter just toast, assuming that my starter is the problem. Checked fuses, all are good, relays not too sure, batteries also good to go. Would appreciate some advice from this cool forum. Thanks
  • My Dodge died while driving it today and it won't start again. All electrical still working. At first it would turn over and run but only for a few seconds and then it would die again. It won't run at all now but just cranks. The weather just turned cold today, it was about 33 degrees when this occurred. My truck hasn't been in cold weather for a while. I don't know if this would affect anything but the truck had just been taken over a big slushy puddle at about 45 MPH moments before it died. I have a quarter tank of gas, replaced the fuel filter less then 10,000 miles ago. Any ideas?
  • My '96 Dodge 3500 Diesel won't shift into overdrive. One day it shifted fine the next day it wouldn't shift into 4th gear. The fluid is full and only has about 5,000 miles since the fluid and the filter were last changed. What might be the problem?
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