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Dodge Ram Cummins Diesel Questions

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  • jshaw2jshaw2 Posts: 2
    I'm getting unusually low fuel milage for my truck
    I get 17 if I keep it under 2000RPM's but if I touch 2100 RPM I immediatly drop to 12-13
    When I tow anything from my 5000lb trailer to my 15,000lb trailer I get about 8MPG.
    I also don't seem to have much power with the truck
    I'm thinking there could be something majorly wrong with the engine in this truck but I'm just now sure.
    My friend has an 06 with the HO as well with LARGER tires then me and he is getting 20-25 on the freeway and 16 towing.
    Is there in fact something wrong with my engine or is there that much of a difference between the 04 and 06?

    (The reason I'm suspecting an engine problem is also because I bought the truck used, and found evidence of at one point in time the truck having a chip AND programmer of some type, as well as having a 15,000lb rated 5th-wheel hitch)
  • KCRamKCRam Mt. Arlington NJPosts: 3,516
    Larger tires installed on an otherwise unchanges truck will indeed produce better mpg, because the increased tore size has the same effect as overdrive - it numerically reduces the axle ratio.

    You didn't mention which Ram you have... 2500/3500, regular cab/Quad Cab, 4x2/4x4, dually if 3500... so it's hard to tell what you may be experieincing regarding mpg and power.

    kcram - Pickups/Wagons Host
  • 1945d73t1945d73t Posts: 1
    PLEASE HELP. I WAS JUST ON A TRIP AND THIS STARTED. WHEN AT IDLE AROUND 800 RPM OR SO THE ENGINE JUST SHUTS OFF MOMENTARILY. AS IT IS WINDING DOWN AND REACHES ABOUT 400 RPM IT REVES BACK TO LIFE AND SHOOTS UP TO ABOUT 1500 RPM BEFORE SETTLING BACK DOWN TO 800 RPM. IT IS INTERMITTENT AND DOES IT ONLY WHEN IT WANTS TO, BUT ONLY AT IDLE. ALSO WHEN IT HAS DONE THIS THE IDLE SEEMS ROUGH THEN SMOOTH THEN ROUGH THEN SMOOTH GETTING BETTER WITH TIME UNTIL IT IS NOT NOTICABLE ANYMORE, UNTIL THE ENGINE TRIES TO DIE AGAIN AND IT REPEATES THE PROCESS OVER AGAIN. WHEN ACCELORATOR IS IN ANY POSITION OTHER THEN IDLE IT SEEMS FINE. ANY IDEAS? PLEASE HELP. I'M AT A LOSS. :cry:
  • can someone tell me where the heater is , and what it is called. truck runs rough in the cold- the wait to start light stays on for a long time. this just started about 2 years ago. 1999 dodge ram 3500 cummings 5.9 24- valve runs fine when i plug the 110 block heater in. any info will help. thanks
  • i have a 2500 diesel 2001 model dodge ram 5.9 cummins the problem is running rough in idle and when shift to drive some times dies on me and is hard to start what can be the problem?
  • I have a 2003 Dodge Ram 2500 with a 5.9L Cummins engine. The truck was fine for the 1st 3 years, now that I'm 2 months from paying it off; and spending over $7k at the dealer .. they can not figure out the problem. 2 months ago, the stock lift pump died and the dealer installed a in-tank lift pump from Dodge. The next day, same problem, hard start in the AM. They said it was the Common Rail pump. I purchased that from Cummings at $1400 and had the dealer install it. Here's where it really goes bad.... 7 days later, the truck is missing on the cylinders and shuts off. I drove it back to the dealer, who said that there was water in the tank. They drained the tank, then said it was the fuel injectors damaged by the water. The replaced the injectors ($360.00 ea from Cummings). I drove it 10 miles home, same problem. I had to have it towed back to the shop, where they said the Common Rail pump was bad. You can buy that from www.shopdiesel specialist.com for about $800.00. They fixed it, I drove it 10 miles, same problem. I had it towed back to the shop, where I got a loaner car, and was told that they would fix the problem at no cost. Next day, I got a call that there was water in the tank again (as viewed from the stock fuel filter housing). Now they say, I again got bad fuel; thou the prior time they said it was from where I filled it up. Yet the diesel mechanic drives a diesel, and has filled at that station and the other station (I later used w/ no problems). Now the shop will drain the tank (2nd time), and add their own fuel, and try it out. I've been warned it could be the Common Rail Pump bad (3rd time). I can not even keep the car running to get rid of it. Any ideas on how water could appear in a tank? The fuel stations are good, no pissed off neighbors or that would even know about diesel and water. I have a dual fuel filter & water separator to add, but it will not stay running long enough to add it. :lemon:
  • Man you have the patience of Jobe. Check out site fourwinds=it.com. "Algae" can cause tremendous problems. There are other sites to read. I know of a dealer who had to replace the entire fuel system of a brand new truck and I mean every thing. If you have it in your system your might find fuel treatments to save you from more waisted money. Besides, dealers with true diesel mech are hard to find. Good luck. keep us informed. Roger
  • ddwcddwc Posts: 5
    first of all i wouldnt take it a dealer i having similar problem my truck the dealer told me i have water in my fuel told me it would cost 3000.00 to 8000.00 to repair i took to a individual could not find water in fuel the dealer overlooked 4 codes computer still having problems nobody can tell me the cause stock truck 2003 2500 cummings find you a nother shop dealers taking your money and giving you no results
  • I really hate to sound like one adding insult to injury. It sounds like you've been through the ringer already, but definitely find another dealer. I'd say that one is either incompetent or a crook. If it's a Chrysler dealership, consider a Cummins big rig dealer. They'd know the engine well enough to beat what you've seen so far. Good luck!
  • There is a pump behind the passenger side battery?
    Question is this suppose to stay on all the time?
    What is it and what does it do.
  • Hi, I am having almost similar problem with my 04 3500 suddenly dying at freeway speeds and/or stop light and can't seem to find an answer. It always starts right up but I never know when it's going to shut down. On one occasion it took 6 attempts to start. Each time running a couple of seconds and dying until 6th try kept running. If you don't mind sharing what you find out with me it would be greatly appreciated. All my best. Dale detailsbydale@yahoo.com
  • ddwcddwc Posts: 5
    i dont know what your problem is but i have similar problems nobody can tell what it is mine cuts out at any speed even at idle its getting worse i just shut it down and hope it starts sometimes its takes 2or 3 times to crank backup but it straightens up runs fine but i can always predict when its fixing to scew up its starts running better few days later it screws up hadnt found that right shop or mechanic to tell whats theproblem im about ready to hash it out with dodge and tell them to either fix or buy it 2003 -2500 cummins allstock buy the way i get about 7-9 codes from brand new ecm same codes from old ecm
  • Thanks. When this first started, I checked with the local Atlantic Cummins shop, who said that they did not have the Diagnostic Computer Codes (starting in 2003) to work on it. Right now, I'm waiting to hear if my car insurance company will pay (good luck, huh); but they say the entire fuel system has to be replaced. Which I can do myself, but I'm back to being held hostage by 2 Chrysler dealerships. I'll check into algae remover additives; all I want to do is get it running and get rid of it. WRT other questions asked, I can only answer w/ my symptoms. When the vehicle is hard to start on cold mornings, it could be the lift pump which if unchecked will cause the common rail pump to fail. Recommend adding a electric (keep fuel out of cabin) fuel pump gauge to monitor the lift pump. Also FASS makes a lift pump with 2 extra fuel filters, same cost as stock. Either way add a separate fuel water separator filter. WRT engine stalling, missing and smoking - symptons of my common rail pump failing. BullyDog makes a electronic display system that monitors alot of items (incl. high pressure fuel output) for about $600.00. WRT engine shutting off, remove the fuel filter housing top and verify the color of the fuel. Diesel fuel new, is skyblue. If the fuel is yellow or green, it is contaminated. Does anyone know if it is possible for the fuel injectors, to replace parts of it (say tips that are water contaminated?
  • I am looking to purchase a Dodge Ram. I have only owned non-diesel Dodge trucks up until now. I am trying to find a website that can help tell me the value of some of the trucks I am looking at. I have always used KBB to get an idea of the valule, but I am unable to find anything that tells me about diesels. Any help would be greatly apprecitated
  • That is your vacuum supply pump. It will run most of the time the key is on. It will quit if no vac. is needed.
  • bb5862bb5862 Posts: 1
    I have a 2001 ram 2500 diesel, automatic transmission. The engine runs fine, but it dies when you put it in revese or drive. When you do get it to run it runs great on the road and does not die. Has a new lift pump, ecm checks ok, STUMPED
  • nuts4koinuts4koi Posts: 1
    I have a 2000 Ram 2500 that recently developed a problem. When I first start it, it will take 3-5 minutes for the volts to come up above 14. If I try to drive it before it has reached 14 volts, there is white smoke that comes from the exhaust (like a cold start) and there is no power. There are also times, especially when I maintain a constant speed, the power will drop off, and the rpms fall. If I put the clutch in and put my foot on the floor, white smoke comes out of the exhaust and then the engine picks back up. Any Ideas?
  • lconnelllconnell Posts: 3
    I have a 2009 Dodge 3500 with a blown engine with 148,000 miles on it. Dodge will only pay half of the replacement engine. How common is this? Where can I find info on the number of 6.7 liter engines have failed?
  • have you checked you fuel filter yet, when you do , change it and buy a couple of them to keep with you
  • How do you change the fuel filter on a 2004 Dodge 3500? Have not done this on my own. Do I risk getting air in the line if done improperly?
  • grizwald1grizwald1 Posts: 3
    What causes the P1389 code, no communications between the PCM and the Automatic Shut Down relay, and how do you clear it?
  • any one have this problem I got a 2001 whit a 5.9 cummins when is cold start good after run for a while turner off , try to start aguien take little while to start try to shift on gear and die on me also when accelerate on park blow white smoke, any help on that thanks.
  • ssaarissaari Posts: 5
    check to see if head gasket is leaking water could be the reason for the white smoke
  • My 2002 Dodge 2500 with the diesel and automatic trans has erratic torque convertor lockup and unlock that I believe is caused by RFI. Please tell me more about this problem and how to isolate the cause.
  • splinter19splinter19 Posts: 1
    have you figured out the problem my 2000 ram 3500 is doing the same thing. now i have stacks right behind the cab straight piped and i noticed when in drive or reverse with your foot on the brake completely stoped it idles up.
  • nano74nano74 Posts: 1
    My 2001 was the same and we notice the fuel leak. I changed out all the steel fuel lines and the problem was actually the "O-ring". I haven't had anymore problems with a hard start since. My hard start started with 1/4 tank fuel and when we replaced the lines it was at just under the full line I would start haveing the hard starts.
  • shorbshorb Posts: 2
    I have an 02 Cummins and had to replace the transfer pump and injection pump. The transfer pump stock one should only cost u 200 tops. Bad thing is the injection pump is aluminum and is lubricated by your fuel so if your transfer pump goes out 99% of the time it will score your injection pump and u have to replace it also. An injection pump runs around 1100 bucks. My advice is to put a FASS transfer pump on cause the stock ones are junk they don't keep up and if u chip them, u might as well forget it. The transfer pump was the one big flaw with those years of Cummins. I went through it and it sucks. Also get a fuel pressure light put in so u can tell when your fuel pressure is low and u can get off the throttle and save your injection pump.
  • shorbshorb Posts: 2
    I have an 02 Cummins with a Bully Torque Dog chip, 65hp. I was wondering if I can stack a Superchip Flashpaq Tuner with it? And if so do i need to get bigger injectors? I have a FASS system on it and know it will keep up and I don't plan on running both chips on high, just for racing purposes not everyday driving.
  • cumminsman123cumminsman123 Posts: 2
    edited May 2010
    i have a 01 2500 cummins and have never had any problems but i was drivng to work last night and it just died it would not start back so i unpluged my quadzilla chip and plug it back in still nothing after bout 4 time it started so i took off and noticed my check engine light was on my rpms were not registering and i had no power at all so i pulled back over completely removed the chip and put the truck back to factory but no change still no power at all check engine light is on and the rpms are not registering any one got any answers
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