08 6.7 non-delete runs rough below 1500 RPMS and blows lots of white smoke
 

PLEASE HELP>>>>
I just bought this 08 6.7 cummins, dealer had paperwork for new injectors. I just replaced fuel filter a little over 1,000 miles ago. have noticed a knock before and lots of black smoke before. now it runs rough at idle and up to 1500+ rpms then runs fine AND blows tons of white smoke especially at low rpms accelerating (non-combusted fuel?). It has 348,800 miles. It appears to have all its stock emissions and exhaust. I have a feeling previous owner deleted it and had a tuner. I don't know for sure though. I live in California to make things worse and can't delete right now, I need more funds. If I manually shift my auto trans keeping it near 2k rpms and more it runs fine. until I slow down or go into overdrive. Has terrible acceleration Thanks

Any codes setting? Need more info, did dealer program new injector codes into PCM? If they did not then could be fueling problem since old codes are in the PCM and not codes for new injectors. Black smoke before changing filter now running rough? sounds like injectors to me knocking is sign of overfueling. Is the oil level over full?

ok no codes. No CEL oil level is fine, actually less than full and I have been keeping an eye on it. The black smoke and also would white smoke sometimes before and after filter change.
I have know idea if PCM was reprogrammed. would it have run fine for 4,000 miles? my mpg dived also

ok today a bunch of codes popped up, about 11 codes all exhaust related I think, I'm sure it's time to delete but my finances won't allow that yet

How long you had this? It ran fine for 4K miles until now? Post all the codes to get help.

codes in order
1) P2453 - Diesel Particulate filter pressure sensor A circuit performance

2) P0131 - 02 sensor 1/1 circuit low

3) P244A - diesel particulate filter differential pressure too low

4) P2000 - NOX absorber efficiency below threshold - bank 1

5) P2A01 - 02 sensor 1/2 circuit performance

6) P0128 - thermostat rationality

7) P0420 - ?? efficiency below threshold? - not 100% sure what code is

8) P0489 - EGR control circuit low

9) P0513 - invalid skin key

10) P0471 - exhaust pressure sensor 1 performance

To recap: fuel and air filter changed 1,200 miles ago. injectors replaced by dealer (used) w/paperwork it was done. oil level is fine
blows mostly white smoke excessively at idle and under 1500 rpms. I seen puffs of black smoke on acceleration around 2000 rpms but more white smoke than anything. will cruise down the freeway at 2-2.5k rpms little smoke and roughness. I don't hear turbo but not sure if I should anyhow. it has all the stock and emission stuff. If I were to guess previous owner had removed the emissions and had a tuner/egr delete but I can't be positive. Dealer, who is a very honest guy, said emissions were on when he got it from auction. He replaced the injectors because it was running poor. He said the guys who did injectors also adjusted valves. Also prior to this I had a what I thought was valves ticking sound or what sounds like an old van with an exhaust/vacuum leak. still does shimmy and sound like an exhaust leak now at lower rpms, shakes sputters and is gutless. I can get it in to be diagnosed/fixed but not til wednesday next week. I would rather just fix it myself this weekend if I can. Maybe cleaning the EGR replace some sensors and I could get by until I get stuff to correctly delete and get rid of that egr crap. Thank you

So how long was it running fine for you? Sounds like no emissions are even hooked up.

As long as I have owned it month and a half. Put 4000 miles or more though. I disconnected the EGR this morning no CEL still I also unhooked the battery for 45 mins or so. All the codes I got and no CEL ever. The CEL illuminates when I turn key on so it's not defective bulb. Runs a little better especially near 2000 rpms still smokes like a chimney mostly white smoke but occasionally black. It has also been running cool almost it seems. I put DPF cleaner in it the other day with fill up I've used over half that tank. Thinking maybe try some more cleaner? Just need it to get me through until I get the cash together and time to install tuner and deleting . Being in California limits shops willing to mess with emissions even if I don't want paperwork and pay cash. I don't know if I can clean the DPF and sensors EGR I'll just keep unhooked (I unhooked the connection on the intake side. Tia

In California, doesn't the seller have to pass vehicle smog/emissions? Black smoke is fuel and the white smoke is oil or coolant even. Maybe there are other things going on. But it is not running right, smokes, and had lots of emissions CELs. Not sure what more to try other than taking it back to whomever sold or worked on it or someone else that can work on it and check things. Maybe some others here have suggestions on where to check first.

well an update. I disconnected the egr. ran pretty much the same all day. Thought I would try and regen the dpf. looked up online what to do and come to realize that there is no NOX absorber catalyst (catalytic converter) or dpf existing on the truck, so dealer sold me a truck that is missing emission controls (federal violation?) It's not like I want them but if it caused a problem I would just rather have it fixed. excessive smoking is terrible, I noticed the smoke isn't pure white but has a grey tint and occasionally black smoke. The rough running is annoying but higher rpms it smooths out but decelerate and it shimmies, sputters and rpms fluctuate around 5-800 rpms.

I was wondering if anyone thinks the crankcase filter could effect this? I am thinking of changing that maybe its causing a vacuum leak? The only other things I can think to do is change the fuel filter again, this time do it myself instead of the oil change place, but I watched them do it. otherwise injectors? PLEASE SOMEONE HELP ME OUT THAT HAS KNOWLEDGE ON THESE.

are codes I get off odometer with key reflect all codes? or does a scanner show more codes? all my codes are related to emissions (which are deleted/disconnected) [duhhh]

Sounds like you have a stock tune loaded into the ECM and its looking for things that aren't there..

took it into a local repair shop he said #2 injector is not working. So I'm going to pull valve cover look at it and remove injector if I don't see anything obvious wish me luck. Found out dealer removed or had smog pass on a deleted truck

Have dealer buy it back or you will be looking at $$ to repair. I can't believe he sold you a deleted truck. Big fine for him and can lose his license.

he doesn't seem too concerned with it. I don't know if he is playing dumb or if he really not concerned? I have talked to him a few times today, but never once did he act like he was worried. maybe I should send him an email. I just want a working truck I don't have time for his crap or working on one, losing money everyday focused on truck and not work

shop also said it didn't show any codes not even the ones I found on odometer. he said he started at #6 injector checked out, then #5 and it leveled out and worked correctly then it checked out, then #4 checked out, #3 checked out and #2 was dead,in his words. I need to get to his shop to confront him and if its running where I can drive it without leaving a cloud trail it would be better

opened valve cover and it was #2 intake valve bridge was in the galley and the rocker arm plastic piece that pushes on the valve bridge is missing. going to adjust it for now order a new rocker and hope that fixes it
https://cimg9.ibsrv.net/gimg/www.die...396c51b308.jpg

https://cimg1.ibsrv.net/gimg/www.die...8faaea3f41.jpg

Wow that is pretty a bad situation... I hope you can get this thing bought back, and turn in that dealer so another consumer is not victimized... Then go get yourself another one of these trucks that hasn't been mismanaged and you will be very happy.

With a Dealer like that you will have to sue him to get him to act. They will always settle out of court since he knows he will lose. Paying lawyers fees and court costs will be very expensive for him. He will buy it back but you will need to get a lawyer involved. Sorry but that's the way this business has gotten lately, suing is the only thing they understand.

Update
 

Update: I have been in contact with an attorney. Long story short, dealer told me I need a diesel mechanic and he isn't even sure those years were even equipped with a "DPF" as his words "I am not a diesel mechanic"

Anyhow. I fixed the #2 intake rocker that was broken and adjusted any other loose rockers. I didn't notice any wiring issues with the injectors. Although the connections on the intake side of the valve cover for the injector lines is kind of loose, but I don't think thats my problem

It now intermittently runs rough, seems to run best colder. sometimes running it w/tow and exhaust brake on helps, sometimes not. I definitely had some raw fuel in the exhaust system that has burned out. If I high idle it runs fine 1100-1200 rpms and little smoke. but letting it idle regular it fluctuates around 600-800 runs rough and smokes (white or maybe grey smoke) sometimes no excessive smoke, but it is random. It has started recently have check engine light after it's up to operating temp and commute. Shows 21 codes, mainly related to emissions (DPF, EGR, O2 and related) except 3 codes: #4 cylinder misfire, Transmission code (probably related to running rough a pressure sensor or something) but the last 2 days I have had a CEL it goes off after a few start ups.
I am asking for any advice, as I need to get this truck to be dependable. I am thinking of doing a programmer first, see if that corrects the problem. I suspect the dealer, or his detailer, removed the one that was in the truck by PO as when I got truck, the OBD port was unattached to the bracket it is supposed to go in. So hopefully that would remedy the problem. otherwise my next move would be to replace injector wiring harness, then injectors as I don't know if they were replaced as the dealer showed me the paid receipt, (possibly fake he "forgot" to include the receipt and refuses to send me a copy or weasels out of sending it. Thank you

also it IS DELETED as far as DPF,CAT has straight pipe w/sensors in it.

And really odd is my overflow for coolant was full at operating temp, but radiator cap was just warm. opening it, it had a lot of pressure and looks like radiator is a little low, maybe half gallon or less, temp gauge has been reading normal temps

Anyway to get ahold of the previous owner to see if he/she still has the tuner? It should be VIN locked if they didn't send it back to stock.

Can you find someone local to borrow a delete tuner?

Hell, if you were closer I'd take my Mini-Maxx off and we'd test it.



-Kris

last few days has ran excellent, no smoke rough idle, still has some minor hiccups. I unhooked the EGR connections and haven't had a problem. Got ahold of a place and thinking of buying an H&S w/delete tune and auto trans tune and also get the EGR delete components $1,100.00 it also will monitor my vitals and buying new has a warranty and also tech support from place I am buying from, they are extremely reputable out of Wisconsin

Get the attorney after him and get rid of the truck. Being in Cali. I (personally) wouldn't want to be caught with that truck for emission or that commie state would hang you out to try. Cali is on a whole new lever of stupidity. Stop dicking around at let the attorney handle it. The seller should of atleast ran codes if what holds true to what the other member said about the smog emission must pass before being sold.

All I can say is you must REALLY want the particular truck because there's more wrong with it than right.

I assume the dealer you're talking about is a private/used car dealer not a factory dealership?
Any warranty?

Are you in a smog check area? If so then you'll need all those exhaust parts in two years to pass smog to the tune of $3-4k. You can find some take-offs for around $1k but it's a crap shoot if they're in good shape or not.

As for the dealer, they know it's deleted and they're just playing dumb and waiting for you to give up. All they have to do is check with carb to be sure. It's your call but they should cough up some cash at the very least to offset your costs of deleting or install the correct exhaust components to make it legal.

The cylinder #4 missfire indicates you still have a problem. If not the injector then there's another issue (bad harness, valve/valve seat, piston, piston wall, HEAD GASKET etc) thats going to cost you alot more $$$ than deleting.
(High coolant level in the overflow and low level in radiator can indicate a bad head gasket)

Lawyer up or cough up $$$ to fix everything.