6.7 turned smoker - Page 2

mdcody101 · 09-06-2007, 08:32 PM

the 6.7 SHOULD NEVER smoke!! if you truck smokes there is a problem. make sure that you have the newest software there is a flash update for excessive soot cause the truck is over fueling.

__________________
Don't own one just make a living off working on them

mulehunter · 09-07-2007, 05:20 PM

there is a new up date flash as of 8 31

cmason · 09-08-2007, 11:47 AM

Got my 6.7 in June and have 2500 miles on it and no smoke yet. Had one dealer oil change at 1500 miles and asked them to make sure they use the proper oil, so they must have. Getting 18.5 mpg on highway light and 12 towing a 7000lb boat at 65 mph. so far happy but still getting used to the trans shifting so much when loaded.

taylor810 · 09-10-2007, 07:08 AM

I agree with you guys, cummins makes a great engine. I had a 5.9 that I pulled my 5th wheel with and never had a minutes trouble. I traded it a few months ago on the 6.7 with the 68RE Tranny and other than running a little sluggish and the engine malfunction light staying on. I love it!!! I took it in to the dealer and they re-programmed it and told me about the regeneration process etc...Also I was told this correct the problem. The light now comes about once a week and may stay on for a few days. It is a little unnerving - I'm just concerned that if i'm pulling the camper and this alarm comes in should I just ignore it? I was told that Cummins did over a million miles of testing before this engine was put into production. You would thought this would have showed up then but, you never know. Other than that it is a great truck!

m56irsul · 09-13-2007, 02:26 PM

i have a 6.7 with 22,000 miles on it.

i run strictly on the open highway hauling RVs, so far no smoke on mine and has been running quite good. Taking mine in tomorrow for service work as it seems not to be getting good mileage. Getting roughly 8-11 mpg when pulling 8500-11,000lb travel trailers.

no load on the truck going 75mph i can get 17.5mpg

would like all feedback on how to improve my mileage . . .

what are thoughts on putting chip in and does that void the warranty (100,000 mi warranty with drivetrain and motor)

__________________

Mike - Hastings, MN

2007 3500 QuadCab 4wd Dually - 6.7 Diesel
1963 Ford Falcon 2-dr
1964 Ford Falcon Futura Convertible

txrlk · 09-14-2007, 11:56 AM

The 6.7 should not smoke.....take it back to the dealer and tell them to make it right. There could be several things causing the smoke but my first suspicion is the new catalytic system.

vchap · 09-14-2007, 01:34 PM

I called the dealer. Not aware of anything. I think I'm going to find another dealer. Phoenix has quite a few to choose from. I put the exhaust brake on and the thing smoke real bad. Does that mean there is a lot of soot that needs to be burned out? I towed my 8000 lb trailer for 1,000 miles and it didn't ever clear out. Still no lights or warnings and still runs strong, just smokes A LOT. Much more than my brother's 5.9L.

Gary Morency · 09-17-2007, 04:27 AM

I just returned from 1000mile trip with truckcamper tailpipe still clean but only 11.7 mpg with camper on 65 mph . Were is all this fuel going in the city empty 10 is it thats the only issue also I,m not touching that exaustbrake until we find out what this soot problem is caused by.

creecrop · 09-17-2007, 05:29 PM

there is a design for burn off or blow off , which does send it out the exhaust , older the motor , the thicker the build up, let the smoke fly

__________________
2006 ram 2500 heavy duty sport 4x4 q/c 5.9 cummins turbo

CUMMINS114 · 09-18-2007, 03:45 PM

do you have a teenage son that may have tuned it? LOL

__________________
*FOR SALE* 2002 SPORT 2500 4x4 AUTO cummins 5.9 ISB, K&N CAI, HX-40, edge comp, BD-RAD, 150/150 FASS, bd stealth plate, TC switch, Ultra LiteIIgauges, leveled, 03-05 badges, 6"single mitre.

vchap · 09-18-2007, 05:22 PM

Now the engine light is on. It will stay on for about a day then go off. It's the first time the light has come on. Twice this past weekend.

Big Brothers Transport · 09-20-2007, 08:06 PM

Doesnt seem like any one uses ther vehicle for work.I have 12k since aug 15.The only thjng I can complain about is a check engine light & 9.3 to10.5mpg on a long hall. Not blowing any smoke.Any suggestions on better fuel economy? Henry Grau

09-08-2007, 11:47 AM	#15 (permalink)
cmason Newbie Join Date: Jun 2007 Location: Washington Posts: 2 cmason's Truck Pics	6.7 no smoke Got my 6.7 in June and have 2500 miles on it and no smoke yet. Had one dealer oil change at 1500 miles and asked them to make sure they use the proper oil, so they must have. Getting 18.5 mpg on highway light and 12 towing a 7000lb boat at 65 mph. so far happy but still getting used to the trans shifting so much when loaded.

09-10-2007, 07:08 AM	#16 (permalink)
taylor810 Newbie Join Date: Sep 2007 Posts: 3 taylor810's Truck Pics	taylor810 I agree with you guys, cummins makes a great engine. I had a 5.9 that I pulled my 5th wheel with and never had a minutes trouble. I traded it a few months ago on the 6.7 with the 68RE Tranny and other than running a little sluggish and the engine malfunction light staying on. I love it!!! I took it in to the dealer and they re-programmed it and told me about the regeneration process etc...Also I was told this correct the problem. The light now comes about once a week and may stay on for a few days. It is a little unnerving - I'm just concerned that if i'm pulling the camper and this alarm comes in should I just ignore it? I was told that Cummins did over a million miles of testing before this engine was put into production. You would thought this would have showed up then but, you never know. Other than that it is a great truck!

09-20-2007, 08:06 PM	#24 (permalink)
Big Brothers Transport Newbie Join Date: Sep 2007 Posts: 2 Big Brothers Transport's Truck Pics	Big Brothers Transport Doesnt seem like any one uses ther vehicle for work.I have 12k since aug 15.The only thjng I can complain about is a check engine light & 9.3 to10.5mpg on a long hall. Not blowing any smoke.Any suggestions on better fuel economy? Henry Grau

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09-06-2007, 08:32 PM	#13 (permalink)
mdcody101 TECH SPECIALIST Join Date: Jul 2007 Location: Minnesota Posts: 328 mdcody101's Truck Pics	the 6.7 SHOULD NEVER smoke!! if you truck smokes there is a problem. make sure that you have the newest software there is a flash update for excessive soot cause the truck is over fueling. __________________ Don't own one just make a living off working on them

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09-07-2007, 05:20 PM	#14 (permalink)
mulehunter Cummins Fan Join Date: Jul 2007 Location: concord ca Posts: 66 mulehunter's Truck Pics	there is a new up date flash as of 8 31

09-13-2007, 02:26 PM	#17 (permalink)
m56irsul RV Hauler Join Date: Sep 2007 Location: Hastings, MN Posts: 7 m56irsul's Truck Pics	i have a 6.7 with 22,000 miles on it. i run strictly on the open highway hauling RVs, so far no smoke on mine and has been running quite good. Taking mine in tomorrow for service work as it seems not to be getting good mileage. Getting roughly 8-11 mpg when pulling 8500-11,000lb travel trailers. no load on the truck going 75mph i can get 17.5mpg would like all feedback on how to improve my mileage . . . what are thoughts on putting chip in and does that void the warranty (100,000 mi warranty with drivetrain and motor) __________________ Mike - Hastings, MN 2007 3500 QuadCab 4wd Dually - 6.7 Diesel 1963 Ford Falcon 2-dr 1964 Ford Falcon Futura Convertible

09-14-2007, 11:56 AM	#18 (permalink)
txrlk Cummins Enthusiast Join Date: Jul 2007 Location: TEXAS Posts: 221 txrlk's Truck Pics	The 6.7 should not smoke.....take it back to the dealer and tell them to make it right. There could be several things causing the smoke but my first suspicion is the new catalytic system.

09-14-2007, 01:34 PM	#19 (permalink)
vchap Newbie Join Date: Mar 2007 Posts: 8 vchap's Truck Pics	I called the dealer. Not aware of anything. I think I'm going to find another dealer. Phoenix has quite a few to choose from. I put the exhaust brake on and the thing smoke real bad. Does that mean there is a lot of soot that needs to be burned out? I towed my 8000 lb trailer for 1,000 miles and it didn't ever clear out. Still no lights or warnings and still runs strong, just smokes A LOT. Much more than my brother's 5.9L.

09-17-2007, 04:27 AM	#20 (permalink)
Gary Morency Cummins Fan Join Date: Aug 2007 Posts: 61 Gary Morency's Truck Pics	I just returned from 1000mile trip with truckcamper tailpipe still clean but only 11.7 mpg with camper on 65 mph . Were is all this fuel going in the city empty 10 is it thats the only issue also I,m not touching that exaustbrake until we find out what this soot problem is caused by.

09-17-2007, 05:29 PM	#21 (permalink)
creecrop Newbie Join Date: Mar 2007 Posts: 3 creecrop's Truck Pics	there is a design for burn off or blow off , which does send it out the exhaust , older the motor , the thicker the build up, let the smoke fly __________________ 2006 ram 2500 heavy duty sport 4x4 q/c 5.9 cummins turbo

09-18-2007, 03:45 PM	#22 (permalink)
CUMMINS114 Cummins Nut Join Date: Sep 2006 Location: Waukesha, Wisconsin Posts: 305 CUMMINS114's Truck Pics	do you have a teenage son that may have tuned it? LOL __________________ FOR SALE 2002 SPORT 2500 4x4 AUTO cummins 5.9 ISB, K&N CAI, HX-40, edge comp, BD-RAD, 150/150 FASS, bd stealth plate, TC switch, Ultra LiteIIgauges, leveled, 03-05 badges, 6"single mitre.

09-18-2007, 05:22 PM	#23 (permalink)
vchap Newbie Join Date: Mar 2007 Posts: 8 vchap's Truck Pics	Now the engine light is on. It will stay on for about a day then go off. It's the first time the light has come on. Twice this past weekend.