Archived 2004 gen3 no power help

[Joseph Donnelly]

If boost goes over about 25 psi, the computer defuels the engine. Sounds like your wastegate is not opening and the turbo is building too much boost.

 

[dseabaugh]

Not trying to make light of your problem because I know it's a PITA, but have you considered maybe its a ford in disguise???

 

[TCDiesel]

power

I talk to him on the phone today for about 1 hour,everything checks out , but it still has no power. This is going to be a hit and miss fix

 

[dseabaugh]

If everything checks out I think it needs to go to a dealer that can dyno it. , dealer can authorize taking it to a Cummins shop so they can put a load on the beast and see what is going on when loaded. I assume all the timeing is working as specified. Anti skid brakes dragging on truck and holding it back? Dad had a chevrolete that did that. Pulled it down into a lower gear and drove it to the dealer that way he was so mad He said it was boiling water by the time he got there (20 miles) That was Just because it was the 3rd or forth time and the second truck he had that problem with. Please keep us posted .

 

[dseabaugh]

I forgot, Have them to check the muffler and catylitic converter. My last dodge stopped up a couple mufflers and converters due to a fueling problem ( fixed under warranty).

The converter would come apart inside and the pieces would stop up the muffler. The one time the exhaust had a whoosh noise like a vaccum cleaner and it was the exhaust stopping up.

 

[Kmac]

Roadrunner,



Sorry to hear about your troubles!! I have 03 HO 6-speed 4x4 pulling a 4-car hauler as well. I have over 75k miles on my truck with at least 55k of that pulling loaded 4-car trailer. My truck is stock & pulls like a horse. I have no problems running 70mph open road what so ever. Drop me PM with your Phone # if you would like me to give you a call to compare. I would be more than glad to share my experiences if it will help! That truck of yours "just ain't right. " Good luck!!!

 

[dseabaugh]

Have you checked to see if the dealer got the gear ratios right when they ordered the new truck. Are both trucks running about the same rpms at a given mph?

 

[roadrunner transport]

That is funny you mentioned gear ratios. I bought a black 04 in early october. only to find out the window sticker was wrong and the truck had 3. 73 ratio's. I had the truck lettered,rear spring done ,etc. dealer was forced by chrysler to buy that one back and get me a new one . so they did that now I have a red 04. I made sure to check the ratio on the rear and also the build sheet and it has DMF code 4. 10 ratio. yes, truck is running same mph and rpm as my 03 did

 

[Bob4x4]

The 325/600's I have played with have about 7500 psi @ idle and do peak @ about 33 34 psi boost. Your idle psi is about what the Cal so's run.



Bob

 

[2-ND TIME]

no Hp

Get them to check the engine temp to see if it being told to defuel. Does it idle smoothly or not??? make sure that stat opens when it should.

 

[lmills]

you say the truck is a 305 hp model earlier in your post, but also say cummins 600. So which is it? If it is a 305/555 model, you are running way too much boost. I had left my boost elbow in my turbo when I sold my ez and had similar issues from mine when running the engine under load. As soon as the boost rose around 30 psi it would defuel. I couldn't get my truck out of 5th gear when towing. I took the elbow out and replaced it with the stock elbow and all is well now. If it is a new 325/600 I can't say for sure about those. I haven't heard what they run for boost numbers

 

[roadrunner transport]

I never stated truck was 600, that was someone else. Truck is a 305ho. Dealer is one telling me boost is 34-35 pounds. I thought stock trucks ran 16-19lbs boost. Truck is completely stock- untouched. Only has 4000 miles on it. I want to turn it up, but not until it is running right. Thanks for the input. I am going to forward defueling to the dealer.

 

[Joe Mc]

NJ, Dealer & Cummins Shop close to each other (10 miles)

Sorry to hear about your troubles. I have had some success with Dick Greenfield Dodge in NJ. They are off of US #1, a few miles north of Trenton and have 24 hour service (Mon - Fri) they also have a Diesel Techs on board during those hours (I think one is a TDR Member). They are your typical 5 star (rhymes with dealer) but are more attentive and equipped to take care of "diesel" warranty issues than some of the other dealers in this area. Additionally if you need a Cummins shop theres one about 10 miles from Greenfield in Bristol, PA about a 1/4 mile off Rt #95.



Dick Greenfield Dodge, 2700 Brunswick Pike, Lawrenceville, NJ - 609-882-1000.



Cummins Power Systems, Inc. , 2727 Ford Road, Bristol, PA - 215-785-6005 or if you are in NJ the number is 856-563-0005.



Hope this helps - let us know how you make out.

 

[lmills]

Originally posted by roadrunner transport

I never stated truck was 600, that was someone else. Truck is a 305ho. Dealer is one telling me boost is 34-35 pounds. I thought stock trucks ran 16-19lbs boost. Truck is completely stock- untouched. Only has 4000 miles on it. I want to turn it up, but not until it is running right. Thanks for the input. I am going to forward defueling to the dealer.

Oh OK, sorry for the confusion. I can personally tell you that you have way too much boost. I am MD and can show you how a truck runs with too much boost. It feels like it has no power. If you need more help, shoot me a PM

 

[dseabaugh]

You would think if was defueling from overboost it would be throwing a code. Maybe the computer is wacky from the start if it allows it to build 34 lbs. boost setting in a shop bay without a load. I would not think it could maintain an overboost situation if it defueled after the boost caused a defuel. This it seems would cause it to run erratic... Go like hell, defuel, then after defuel and boost drops, then go like mad again.

 

[dseabaugh]

I think you should just let all of us take it apart to see what it is made of. I always wanted to see what is inside those shiny new rigs anyway.

 

[lmills]

Originally posted by dseabaugh

You would think if was defueling from overboost it would be throwing a code.

Well, actually I drove mine around for a while with my boost elbow in after selling my EZ. I figured I wouldl eave it in till I got my TST box, but couldn't deal with it. My truck would pull hard up till 30 psi and then would defuel. It also never set any codes. It made it a real bear to pull our skid loader over the mountains. I couldn't get it out of 5th gear. It was pretty bad when empty also.

 

[dseabaugh]

Imills, at least I had the pull hard, then defuel part right. The older trucks will code 0234 for over boost. It seems odd the the computer will monitor the boost level yet not record that an out of spec situation has occured. This defueling crap sounds to me like it could put a person in serious jepardy or danger say if you were passing someone, or trying to cross 6 lanes of traffic. The computer will record if you were speeding so the highway patrol can check when you have an accident.

 

[roadrunner transport]

I talked with a cumings tech yesterday , he believes the boost pressure sensor is bad , causing the truck to think it has 34 psi boost when it may only have 20 to 24 psi,cuasing it to defuel and have no power . The power band is flat @ 60 mph + the more you hammer it , it makes no difference only kicks down to drive with no noticeable increase. This truck is going to put me out of business if it don't get fixed soon, Have had to cancel loads for the past few weeks, I would like to Thank those who have taken the time to call and talk with me about his , I really appreciate it.

Thank You all

Charles Phillips

Roadrunner Transportation

 

[roadrunner transport]

One more thing the tech @ the dealer stated to me was the truck has 15psi of boost with the key on but the engine not running. But they think that is ok.