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Dodge Ram Cummins Diesel Questions

642 messages,  Last post on Nov 12, 2009 at 5:22 AM

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What is this discussion about? Dodge Ram Pickup 2500, Dodge Ram Pickup 3500, Diesel, Truck

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#530 of 642 96 Dodge cummins diesel hard to start & stalls by def90 Mar 27, 2009 (1:06 pm)
All, I have a 96 2500 with over 300,000KM on it, and excpet some rust (Ontario) it has been an excelalnt truck. It has just sat with minimal use (max 1 trip per week) for the last 10 weeks. When I got back to it I ran it on a 25km trip, no problems then disaster struck. It stalled on me, was hard to restart(cranked but wouldn't fire) and got progressively worse. I replaced & bled the fuel filter, no improvement! I next suspected the transfer (lift) pump & have jsut replaced that. It still starts if primed, runs if throttle is held at 1250RPM or above. If I let of the pedal it will eventually stall out. If I prime the fuel pump & start & let it run on idle (750-900 rpm) it will run for approx one minute. I see no obvious leaks or damaged fuel lines?????? ANY ADVICE GREATLY ACCEPTED!!!! Replies to this message: red777 (Mar 27, 2009 6:13 pm)
#531 of 642 Re: 97 ram starting problem [sheppardbs] by kcram HOST Mar 27, 2009 (6:13 pm)
Replying to: sheppardbs (Mar 26, 2009 2:24 pm) If it's still cold where you are and you have the block heater, plug it in overnight and see if it starts any easier.   When my 96 Cummins was slow to start, it was usually a progressive thing over time and was always the batteries giving out. But I was religious about waiting for the grid heater, and even a couple of ice-cold starts by my dad had no lasting effect on the starter.   Best guess is batteries - the cold cranking may have worn them out. (Remember, the 12-valve Cummins is completely mechanical and once started, requires almost no electrical draw once the grid heater has stopped cycling.) Second would be a worn starter, and if so, you probably want to get that replaced as a matter of preventive maintenance.   kcram - Pickups/Wagons Host Replies to this message: sheppardbs (Mar 31, 2009 3:54 pm) kcram (Mar 31, 2009 5:06 pm)
#532 of 642 Re: 96 Dodge cummins diesel hard to start & stalls [def90] by red777 Mar 27, 2009 (6:13 pm)
Replying to: def90 (Mar 27, 2009 1:06 pm) 2 things: 1) the camshaft sensor is going bad, you have a limited amount of miles to move it before it will jump time and destruct, really bad thing to have happen. 2) where the fuel lines come out of the tank, 2 copper fittings that your factory fuel fittings plug into will rust and suck air, with it not running at idle only at raised rpm i would suspect you are sucking air somewhere in that area. if its not the top 2 fittings its in the lines right after it. leaks are hard to find because of how dodge ran them in the c - channel of the frame around the tank. fuel will leak into the frame and usually has to run the length of the frame to underneath the cab before it finds a hole to leak through.   i would check the lines and if you are 100% sure you are not leaking fuel, then i would have the camshaft timing sensor checked. it is located on the front of the motor with the timing gear, it is a pain in the ass but if its broke it has to be replaced or the engine will jump "time" and destroy itself. . . then it gets real expensive.   hope this helps   -Red
#533 of 642 04 Dodge 3500 w/cummins by ramcharger Mar 30, 2009 (9:25 am)
i just purchased this truck. It's a 4x4 automatice 4dr dually. i noticed a comment today that got me wondering. 04 vs 04.5 What's the difference? How do you know which you have? I don't know the rear gear, but with stock 235/80/17's I'm turning around 2000 at 70. The fuel milage is poor in my way of thinking. I see others have the same questions about milage. Anyone had first hand experience with Bullydog stuff. Considering it. Thanks Replies to this message: kcram (Mar 30, 2009 4:26 pm)
#534 of 642 oil color by ramcharger Mar 30, 2009 (9:40 am)
Does the oil change to black quickly in Diesel engines? I just bought this 04 Dodge and the previous owner said he just changed the oil. I drove it 800 miles home and the oil was black as coal. I changed it and the filter. The oil went black again almost immediately. Is this a concern? Can I clean out the engine? Thanks
#535 of 642 Re: 04 Dodge 3500 w/cummins [ramcharger] by kcram HOST Mar 30, 2009 (4:26 pm)
Replying to: ramcharger (Mar 30, 2009 9:25 am) To check the engine, look on the driver's side valve cover. If it says "ISB 305", it's an early 04. If it says "ISB 325", it's an 04.5.   You have 3.73 axles... essentially, you have the same truck I do, just that mine is a 2005.   As for the oil, yes, it turns black almost instantly - nothing to worry about.   kcram - Pickups/Wagons Host
#536 of 642 follow up by ramcharger Mar 31, 2009 (6:05 am)
Thanks kcram. It is an 04.5. So what is my question. Does this mean an HO? Is there a way to get the torque converter to lock up earlier? At low speeds, the engine RPM is way up compared to ground speed. Could save alot of fuel, more like a manual. Was reading about this last night. Is it only available on Fords? Replies to this message: kcram (Mar 31, 2009 5:03 pm)
#537 of 642 04 Ram Idling rough by emdenton Mar 31, 2009 (7:12 am)
I have an 04 Ram 2500 Cummins with 130k miles. i have recently ran biodiesel in my engine. since i did this, my engine has been idling very rough and vibrating at speed. i have since switched back to petro and i still have the same issue. i have changed the fuel filter twice, but no help. can someone help me on this and give me an idea on what the problem could be? Replies to this message: jason97 (Apr 13, 2009 4:12 pm)
#538 of 642 Re: 97 ram starting problem [kcram] by sheppardbs Mar 31, 2009 (3:54 pm)
Replying to: kcram (Mar 27, 2009 6:13 pm) Kcram............thanks for the info....had my batteries checked ...they're ok, but the starter is pulling way to many amps........255,000 miles , I guess i've gotten my money's worth out of the starter.... Replies to this message: kcram (Mar 31, 2009 5:06 pm)
#539 of 642 Re: follow up [ramcharger] by kcram HOST Mar 31, 2009 (5:03 pm)
Replying to: ramcharger (Mar 31, 2009 6:05 am) For 2003 and the first part of the 04 model year (summer to Dec 2003), there were 3 different ratings for the Cummins: - 235/460 = California - 250/460 = standard output (2003 only) - 305/555 = high output In January 2004 (2004.5), they were all replaced by one 50-state legal engine rated at 325/600.   The TC will not change its lockup pattern unfortunately. For 2005, the calibration was revised and I have different shift points and lock-up speeds than your 2004.5, plus I have Tow/Haul instead of OD-off. (It would be a while before the 48RE was allowed to have both.) You can probably ask a dealer if your transmission software is up to date, although a reflash is not reversible if you don't like what happens afterward.   kcram - Pickups/Wagons Host

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