Thought the LLY would not smoke much. I leave folks behind me on entrance ramps in an absolute cloud. Took truck to dealer and was told they can't do anything to lessen the amount of black smoke. Is anyone else having excessive smoke problems? Hoping a tuner will be available soon to improve mileage and lessen smoke.

I have a new LLY and it doesn't smoke at all, sounds like something is wrong.

I have a new LLY and it doesn't smoke at all, sounds like something is wrong.

How about when you drop the hammer? No smoke then either?

no smoke at all, one of the cleanest burning engines I've ever seen, If your getting smoke with a new LLY I would say something is wrong, IMHO I'm not a tech maybe someone else can give more help.

No smoke at all!!!

Mine doesn't smoke at all until I crank up the Juice...http://www.dieselplace.com/forum/smileys/Approve.gif


It doesn't smoke if the Juice is set to level 0, but if I bump it up or increase the low boost fuel setting, you'll definitely see smoke.


Sounds to me like you've got a problem of some sort...http://www.dieselplace.com/forum/smileys/Ermm.gif

No smoke here!

I have smoke.


I took mine (7000 miles) to the dealer yesterday. They could not find a problem. I had told the service writer that it smokes when I accelarate on a freeway entrance ramp. Not hard enough to downshift, but at about 1/2 throttle. I also told him that I own a 98 Dodge with 100,000. And that it doesn't smoke nearly as much. They checked it out and didn't find a problem. The mechanic took it for a test drive and didn't find "excessive" smoke. The writer mentioned that he had heard of reports that certain oils are more likely to cause smoke. Something about it sticks to the top of the cylinder. Anybody heard about this ?

No smoke here.....................................not yet that is http://www.dieselplace.com/forum/smileys/Big Smile.gif

No smoke for me.

I have smoke.


I took mine (7000 miles) to the dealer yesterday. They could not find a problem. I had told the service writer that it smokes when I accelarate on a freeway entrance ramp. Not hard enough to downshift, but at about 1/2 throttle. I also told him that I own a 98 Dodge with 100,000. And that it doesn't smoke nearly as much. They checked it out and didn't find a problem. The mechanic took it for a test drive and didn't find "excessive" smoke. The writer mentioned that he had heard of reports that certain oils are more likely to cause smoke. Something about it sticks to the top of the cylinder. Anybody heard about this ?






Do you know if they checked the injector balance rates?

No smoke here but mine only has 950 miles on it. So far it has been great.

No smoke.....till Juice is turned up.

My o4 lly will pour out a screen of black smoke when I get on it hard after alot of driving to the grocery store type stuff - once they get worked hard the smoke issue goes away for me.

i have an lly extended cab and my father has an lly crew cab. my dad's will give a big puff af smoke when he gets in the peddle. i told him and he said oh well it is a diesel, but mine did not. now mine will smoke every time i hit the peddle hard. i called the dealer today and he said that all diesels will smoke a little but if mine was smokeing as i told him that i should bring it buy. the dealer also told me that i may need to change the fuel filter that it may cause it to smoke (?) Edited by: doodledumb

No smoke here.. thought it was strange I haven't had any yet as well.. Haven't really towed yet (700 miles).. Expect to see some when we put something heavy in it..


Maybe it is the fuel in different parts of the country? I noticed most people with LLY complaining of smoke are in the SE part of the US...

Thanks for the feedback...I've got 6200 miles on it. It rides,drives, and shifts fine. I tow a 3 horse G/N trailer and sometimes a 5000lb tractor (Diesel of course!) it still smokes even when loaded, especially when accelerating. Normal use is about 80 miles a day, primarily interstate, and I've run only low sulphur Shell diesel since purchase. Going to try switching brand of fuel and find a dealer with a good diesel tech.http://dieselplace.com/forum/smileys/Confused.gif


Doodledumb - Yours did not smoke, now it does. What did you change? Or did you start watching the exhaust pipe after seeing your dad's?

we both put a k&n filter in. that is when i saw the smoke from my dad's, then i started watching mine. it was probably 8 or 9 days after his started when mine started. i checked last knight he has 12000 miles and i have 7800 miles. thanks doodle

I don't know if they checked injector balance rate? What is that ?

I GET 20 PLUS MPG ON THE HWY WHEN GOING EASY (UNDER 80) SO DON'T WANT TO HAVE ANYONE SCREW IT UP - HOPE THERE IS NOTHING MAJOR WRONG - PLEASE LET ME KNOW IF THERE IS A GOOD PLACE TO TAKE IT FOR A CHECK IN THE NORFOLK,VA AREA

Mine didn't smoke at all when the Cat was on, Never even a puff.


With the Converter gone it will just give a hint of smoke when I hammer it, But only for a second.


I also agree, there must be a problem. You shouldn't hardly see a puff of smoke if your truck is stock.Edited by: LLY DMAX

Before mine got Juiced I only noticed it a couple of times. And after the first time I saw it I tried hard to get to smoke again, while accelerating hard it, but it never did.

I would bring it to a different dealer.

2900 miles and no smoke.

2300 miles and no smoke

3500 miles... I can't see any smoke in the day, but at night when I step on it I can see smoke in the headlights of the cars behind me? Does this make sense? Not clouds or anything but I can tell its coming out.

Ditto what Hoser805 said. Only see it in headlights behind me.

Have 12k miles on my LLY and never noticed any smoke...until I added the new Qaudzilla box. Now on stage 1 and especially stage 2 (can't use stage 3 as haven't upgraded intake/exhaust) I look forward to the smoke. The smoke screen hides my rapid exit. I agree with most, don't think you should see smoke with stock setup.

3,400 miles on mine and just a hint of smoke with the juice set on level 3 when I hit passing gear. Other times no smoke.

3500 miles... I can't see any smoke in the day, but at night when I step on it I can see smoke in the headlights of the cars behind me? Does this make sense? Not clouds or anything but I can tell its coming out.


Mine is the exact same way....only if i stab the pedal to the floor i see it gettin on the freeway in the r/v mirror

I have a 04 lly crewcab 4x4. I have seen smoke to i took it in to the dealer they said its becouse its under a load? what by drivein it ever day is under a load? If i punch it i can see some smoke.But i have noiced when its not warmed up it want smoke.

I just found this thread by doing a search. My lly 2100 miles just started to jet a lot of smoke when i hit the gas hard. I can see is in my mirror. I do not know what color but i hope to find out. What did you have done to your trucks to stop this? Is it ok?

what color smoke?? do you smell fuel? a little black smoke is typical when the hammer is dropped, but white smoke is probably injectors. A known issue with LB7 and LLY.

I just took my truck in for this. It never smoked at all when I first bought it, just started about 2 weeks ago. If you don't have the latest calibrations they will reflash and if that does not fix it then one or more injectors may need replacing.

I do not know what color yet i need to see it in the light. But it was not doing it and now it is and it is not a little. I felt bad for the cars behind me and then thought twice and felt bad for my truck. I called the GM delar and they looked up my vin. They said there was no update yet. I ordered my truck and picked it up on nov 12th. I do not know if it is to new to have a update or what.

The trucks that are smoking a lot, how is your performance? When ours was relatively newer (about 1500 miles as opposed to 7000 miles now) we lost the selenoid controlling the variable vanes on the turbo. When gassing on it, my truck would lay down a smoke screen so bad no one could see. BUT I had no performance, the truck was starving for air. Had to baby foot it just to get to 45 mph. Now it is feasible that if you are having a sticky selenoid or the vanes on the turbo are sticking, that it could cause the same symptom and then break loose and run normally. BUT there are lots of issues that can cause excessive smoke, This is just what happened to my truck.....dave

Only time I ever got it to smoke was during a full throttle pass in below freezing conditions. 11,900 miles on it

When new, my LB7 smoked a lot when under heavy acceleration. it lessened quite a bit as the milage was put on. Now at 37,000 it smokes very little when under heavy acceleration.

I also noticed the oil consumption went down considerable as the truck broke in. I wonder if the two are related?

Mine smokes real bad.
































I LIKE IT!!! BWHAHAHAHAHAA!!!! :D

wow you guys are lucky mine smokes like a freight train..............

new to the sight ,have 05 gmc 2500HD d/a coming in a week. Never had a diesel before,any tips.

Mine started smoking at 4500Kmiles REAL BAD... dealer did nothing


Added Stanadyne Lubricity and no more smoke!!!!:ro)

Thanks for all the feedback. Went to several dealerships, GM agrees there is a problem but unable to correct it. I took matters into my own hands and installed a dyno tested package from the RPM Outlet, it contained a Juice and Attitude controller, 4" exhaust, and 4" cold air intake. My smoke problem is gone, my mileage is up, and I'm am totally satisfied with the setup. I drive and tow with the Juice in the "Mileage" mode with computer controlled fueling and it only smokes with the hammer all the way down. I tried setting fueling lower for even less smoke but then saw white smoke, so I put it back to the computer default fueling selection of "3".

Has anyone had a complaint of a malfunctioning stock computer?

My 04.5 LLY just started smoking at 6300 miles, I am use to diesels smoking a lot, but It smokes occasionally at idle, accels, and two days ago it knocked hard and loud for about 30 seconds. The truck goes in tomorrow to get it checked out, and of course now it seems to be fine.

I've heard there are injector problems, with these but I'm not getting any SES lights and power isn't really lessened, but it does miss now.

Any Ideas?

From what I hear is that diesels smoke! Mine smokes really bad when I stomp on it and have it on level 4 or 5. level 3 smokes too but not as bad. I like black smoke!

i had no smoke until i put the edge on

I watched my truck very carefully early on and i always noticed a slight puff right when the key was cranked over and maybe the slightest bit when i hammered it from a dead stop. I installed a hypertech and run it on stage 2 and now it will smoke more when i first lay the pedal down and it will go to a light haze until i let off. Never have tried level three or level 1 though.

The LLY will smoke in variable amounts but just slightly, should not lay huge plums of smoke. However, that being said, every case is different. These differences can be based on turbo efficiency, EGR valve efficiency and fuel injection system. Guys running performance kits all bets are off, each power kit runs different types of mixed signals compared to the base calibration so signals are getting crossed and running interference with the production calibration. That's why your fuel economy is going up, but emissions are also going up. Vehicles running oil impregnated air filters can sometimes give off a oil film which collects on the MAF sensor thus slewing actual air flow and making the truck smoke more.

I have 16,000 miles and more than a few times while sitting at a stop light or in the driveway in gear have had a lot of smoke and shaking. If I put it in Park it seems to stop.

i have a 2005 duramax crew cab w/ no modifications.....at 5000 miles at cruising speed (70-80) i started noticing black smoke......the next day the smoke got worse and at neutral throttle on the freeway the engine would miss bad and then a large cloud of smoke would exit the rear end.......took it in the the dealer and they diagnosed a bad number one fuel injector and stated there was an updated fuel injection software program front the factory......its still in the shop so we will see it its taken care of......my only concern is that my buddy bought the same truck a week later and at the same milage the same problem occurred.........that was a month and a half ago and he is curently going through the lemon law process........hopefully i dont have to go that route...any suggestions?????.......so far the folsom lake chevy dealer in california has been very good i have to say

newbiegirl,
sounds like you need the re-flash.
if you can check the codes see if you have any before you go to the dealer. If you have P0401 or P0404 , dealing with the EGR valve, clear those or you wont get a reflash, they will just document that you had those codes and send you on your way. At least thats what happent to me.

smoke means power be happy it smokes

an update to my last problem w/ the 2005 chevy duramax. i got the truck back and it is running great.....the apparent problem was the number one fuel injector sticking open......the injectors are now on the outside of the engine which makes them much easier to deal with.........they also installed two software updates.......i have gone from getting 15-16 mpg to a solid 18-19......i do feel that the power has been possibly decreased but only by a fraction of a percent................and also NO MORE SMOKE.................in short more smoke does not mean more power...it just means you have a fuel system problem...........i will keep you all updated

So why do I keep on hearing that every diesels are suppose 2 smoke?

I have both models, the 01 has over 275,000 on it and my 04.5 has 25,000. Neither truck smokes, not under acceleration, towing etc.

Don't look in the mirror, I look where I am driving so don't know if it smokes or not.:Nothing_f

Swapped my 04 LLY cloud maker for an 05 with a Bosch controller, see "No smoke with Bosch Fuel Control"

Smoke doesn't mean there is a problem with the fuel system. Smoke means that there is an rich condition, or excessive fuel and not enough air to clean it up. Now maybe yours was a fuel system "problem" but I wouldn't call smoke a problem on a diesel. I happen to like it :). Now if we could just get a little more fuel out of our CP3 pump.

Believe me that motor had a problem! Had a MAC 4" cold air intake and it still did not get enough air.

There is a fuel pickup mod you may be interested in, I forgot the site, do a search on google for diesel performance options.

I've got an 04 LLY crew cab (took delivery in March '04). Everything was fine until I hit around 15,000 miles (it now has 26k). Now when I get on freeway onramps and step into the pedal a little to go from 45 up to 65 to merge onto the highway I get the "smoke in the mirror". I primarily notice it at night as others have mentioned. I took the truck to two dealers, they said it had no codes, and the diesel tech drove it and didn't notice any "excessive" smoke.... It just doesn't seem right. Yeah, diesels smoke a little bit, but a huge cloud, blasting the cards behind you every-time you merge into a freeway? My truck is stock other than a K&N factory replacement air filter, and I stay on top of all the regular maintenance. I'm thinking of swapping the fuel filter again just for the hell of it. Tried diesel from multiple stations too. Same symptoms.

I have 2004.5 GMC 2500HD Crew Cab with LLY. It did not smoke until I install Banks exhaust and EZ edge. Boy what a difference ! I have a hard time keeping my foot out of it. Back to the question now it smokes heavily when it is in stage one,two, or three when you get on it. I'm a little concerned about it because I don't want to look like a kid with a new hot rod but it is pretty cool. It takes me back a few years.

No smoke here. See your service shop.

blows thick smoke cold ,below operating temp- once shes warm no smoke!

I need help! My 05 dmax (7500 miles) started smoking intermittenly about 2 weeks ago. Heavy black smoke at crusing speed on freeway 65 MPH. This morning started smoking so bad that cars behind me in rush hour traffic were giving me a lot of room. Only this time I could hear a distinct pinging. The smoke continued for about 5 minutes didn't matter if I stomped on it or just a little throttle still same. Performance was same as it always has been, except this time the pinging started and it got louder and then a very loud ping followed by BLUE smoke then it cleared up and ran fine. I continued driving about 5 miles to the closest dealer and of course it ran fine during the test drive.
The dealer kept the truck all day and tonite called to tell me they can't duplicate the problem and there are no codes.
The problem is I will be leaving tomorrow on a 800 mile round trip carrying about a half load.
Any suggestions or ideas would be appreciated:help:

Hey Bruce,

That is what mine started to do before I lost 3 injectors. Basically, long story short, it was an intermittent problem that was finally able to diagnose after about 1 month at the dealer. I finally video taped the problem happening so that the dealer could see the problem without having to "recreate" the problem. Funny how after they saw the video, they were able to start recreating the problem.

Mine would act up after about an hour to hour and a half of straight driving. Then it would go on for quite a bit. Basically it was just spewing fuel into the cylinder and felt like the truck was missing real bad. The black smoke would be there, smoking out the traffic behind me and then when you let off on the accelerator I would get a ping and some white smoke. After shutting the motor off for a bit the problem would stop for

Some say try a fuel additive first which supposedly helps eliminate the problem, but that didn't work for me. The dealer finally replaced 3 injectors and I haven't had a problem since. GM compensated with an extended warranty and service contract.

Anyway, I hope this helps and good luck on your trip.

Cory

No smoke 850 miles,2005 4x4 ext cab .

Ditto what Hoser805 said. Only see it in headlights behind me.
+3

I'm now up to just over 4200 miles & I will see some smoke when I punch it IF I've been driving around town a lot.

No smoke on my 05 LLY. Runs extremely clean. Totally stock, except for a shell and powersteps.

new to the sight ,have 05 gmc 2500HD d/a coming in a week. Never had a diesel before,any tips.

Don't smoke.

Smokes very little.. Only when I'm WOT... I see a very thin cloud.. and mostly can see it at night when the lights from cars behind me aren't as bright .

not much smoke with the stock tune, but with pred tow and 65hp I can get some good smoke. If you do alot of city travel the CAT will load up and then when you jump on it all that carbon and soot will blow out the CAT. I like to save it up for the rice grinders that ride on your ass.

I am having the same issue. when i accelerate hard i leave a plume of smoke behind me. Buddy of mine has the same truck no smoke. Should I worry?


...........05,gmc crew cab, carbon metalic

I own a 2005 2500HD duramax diesel, I recently took my truck to the dealer for the same reason. They stated that GM had to upgrade my software. That worked for 1 month and now as of yesterday I still have that problem. The dealer states that I have to put an additive in the fuel every other fill up. I also requested that they put back the the data recorder that they recently took off. what the data recorder does is in the event that it smokes uou push the button and it will take a reading at the time of accurance. Will pick up truck tomorrow.

regards..

I know a good lawyer. Had same problem with my "04" 2500HD DMAX.Now i own a "05" 2500HD DMAX,15k and it's the 2nd time it's been to the dealer. I've should have kept my ''03'' 2500HD 8.1 with allison trans.NO PROBLEMS!!!!!