rough on start - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 12 (permalink) Old 06-25-2007, 09:16 PM Thread Starter
 
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rough on start

a few minutes ago i started my truck ad it was running a lil rough and had a little more diesel clater like it was a 5.9 anyone know wat it would be?.........07 6.7 dually
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post #2 of 12 (permalink) Old 06-26-2007, 03:21 AM
 
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mine is louder when it's going through the active regen, since I do a lot of short trips mine has to go into active regen as opposed to passive regen which is unnoticeable, and will happen during longer sustained trips especially under load.
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post #3 of 12 (permalink) Old 06-28-2007, 02:23 PM
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Originally Posted by RebelBullrider
a few minutes ago i started my truck ad it was running a lil rough and had a little more diesel clater like it was a 5.9 anyone know wat it would be?.........07 6.7 dually
my truck did the same thing at about 400 miles then at 1700 miles. both times it was missing and the engine clatter like an old 12 valve. when driving you could defenily tell that it was missing and surging, pulled over killed truck and restarted after a few minutes and then it started to run fine.
mine is a 07 6.7

I just talked to the dealer and they said that the computer had to be reflashed, they have a new program for this pickups.
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post #4 of 12 (permalink) Old 06-28-2007, 11:23 PM
 
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My '07, 6.7, has clattered at start-up on two different occasions. It was as loud as my old 96, 5.9. The first time it happened I shut it down, re-started, and it was back to normal, very quiet. The second time it happened, it was shut down, restarted, and it was still clattering. A check engine light did not come on.I was only a couple of miles from my dealer so I went there and the service manager had their diesel specialist come out to listen.(I left the engine running so they would be sure to hear the racket). The fellow told me he had the same experience with a truck they were preparing for delivery, shut it down, re-started and the noise went away. Anyway, an appointment was made to have it checked out. They didn't find anything wrong but they performed, what I was told, a government mandated flash that had to do with emissions.
My truck is back in the shop. They called to tell me it is ready and that they replaced a leaking EGR valve but found nothing else wrong. They also said that Chrysler told them the 6.7 has a break-in period of 6k to 8,000 miles before it will be "normal". The fuel mileage really stinks compared to my other two Dodge Cummins, a 96 and an '03. I tow a 12,000 pound fifth wheel. Just returned from a 600 mile round trip, averaging only 10.7mpg. My '03 averaged 13.5 on similar trips.
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post #5 of 12 (permalink) Old 06-28-2007, 11:57 PM Thread Starter
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well mine only did it once same thing as urs i ran it down the pasture a few minutes and it cleared up i havent towed heavy yet cause im saving to get my gooseneck hitch im only 21 so my funds arent rolling in like i would like them too but thanks for all the info my fuel milage is up and down from 14 to 18 well on the overhead but a friend of mine sayd that his overhead never read the right thing so im gonna have to get out the calculator and do it myself to check for sure
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post #6 of 12 (permalink) Old 06-29-2007, 03:52 AM
 
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I have had mine in the shop a few times over the emmissions but never had a bad clater
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post #7 of 12 (permalink) Old 06-29-2007, 04:17 AM
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6.7

on the positive side are you satisfied with the6.7. Ive heard the complaints what about the good things.... mileage?
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post #8 of 12 (permalink) Old 07-02-2007, 10:22 PM
 
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Clatter

Mine did the same thing. Same deal restart and good to go. Also had a hard start issue. The reprogram fixed both issues.

Went to grand jct. 3 weeks ago 480mi round trip towed an empty car trailer out and a jeep on it on the way back. avg mileage was 11.7 with the a/c bastin the whole way. not too gad for a new truck.

Every time I tow I get better mileage and performace after. It's a work truck kids treat it like one.... tow tow tow!
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post #9 of 12 (permalink) Old 07-15-2007, 03:26 PM
 
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When did you guys go get the reprogram? I just got my truck in the first part of May...and I've had a few hard starts. I never thought anything of it but if that would fix it I'll go get it done.
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post #10 of 12 (permalink) Old 07-15-2007, 10:58 PM
 
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Back to the rough running and louder sound, I've since heard on other sites that a sticking EGR valve will produce those symptoms. there's some kind of maintenace that will be needed on them at some point to clean them, from what I've heard.
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