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?
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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 |
Originally Posted by jaconst
(Post 3327273)
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 |
How long you had this? It ran fine for 4K miles until now? Post all the codes to get help.
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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.
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Originally Posted by mega-engr
(Post 3327418)
So how long was it running fine for you? Sounds like no emissions are even hooked up.
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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.
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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]
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Sounds like you have a stock tune loaded into the ECM and its looking for things that aren't there..
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Originally Posted by mega-engr
(Post 3327730)
Sounds like you have a stock tune loaded into the ECM and its looking for things that aren't there..
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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.
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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
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