theoneandonly
Prominent member
Hello again, been away a while.
Read a few posts albeit a bit quickly
@jansla from the last data of yours i collected
I typicaly use my template 4 to start with as it targeted at LPEGRcooler syndrome this is because it is regarded as low hanging fruit ie a too frequent problem with your error codes (Using problem solving techniques used at work as a Manufacturing engineer Aerospace and F1) . once this has been confirmed or denied then a different target or general approach can be found. The template has been honed over the years to also pick up other DPF related problems. To confirm existance of a blocked cooler there are a number of conditions i look at
1 Sooty exhaust
2 error codes from the group P0401,P0402,P236,7,8
3 LPEGR Valve violent move ment max to min no intermediate value
4 Low lpegr temperature
5 P0401 Freezframe data giving an anomalous value of 25% for air intake values
Your data has shown 1,2,3 but not 4 and 5 lpegr temp ok no P0401
It may have the begginings of a blocked cooler but i am convinced it is not blocked.
there was a statement made about this temperature measurement being a policeman for protecting parts from too high a temperature. It may be but,as I think you said the main reason for limmiting the temperature is to reduce charge temp (to a controlled level) in the cylindar and reducing NOx production is part of how the lpegr system works.The LP loop is best suited (used ) for high sppeeds and loads.
I have seen one example where a P0401 had not been thrown but a different one (cant remember but the temperature was about 30C).
@deejays I have added 2 csv files from 2023 that were taken with my template 7 a mutch more general targeted template simular to yours.
ps not actualy looked at them just seen your request (so whats wrong with my engine that I dont know about)
To aid diagnosis of the turbo use a technique known as "wide open throttle pull"
warm engine then clear road and hold in 2nd or 3rd and plant the throtle to floor to 40000 revs then foot off untill idle and repeat (if enough road) use all turbo pids rpm,speed, pedal
Read a few posts albeit a bit quickly
@jansla from the last data of yours i collected
I typicaly use my template 4 to start with as it targeted at LPEGRcooler syndrome this is because it is regarded as low hanging fruit ie a too frequent problem with your error codes (Using problem solving techniques used at work as a Manufacturing engineer Aerospace and F1) . once this has been confirmed or denied then a different target or general approach can be found. The template has been honed over the years to also pick up other DPF related problems. To confirm existance of a blocked cooler there are a number of conditions i look at
1 Sooty exhaust
2 error codes from the group P0401,P0402,P236,7,8
3 LPEGR Valve violent move ment max to min no intermediate value
4 Low lpegr temperature
5 P0401 Freezframe data giving an anomalous value of 25% for air intake values
Your data has shown 1,2,3 but not 4 and 5 lpegr temp ok no P0401
It may have the begginings of a blocked cooler but i am convinced it is not blocked.
there was a statement made about this temperature measurement being a policeman for protecting parts from too high a temperature. It may be but,as I think you said the main reason for limmiting the temperature is to reduce charge temp (to a controlled level) in the cylindar and reducing NOx production is part of how the lpegr system works.The LP loop is best suited (used ) for high sppeeds and loads.
I have seen one example where a P0401 had not been thrown but a different one (cant remember but the temperature was about 30C).
@deejays I have added 2 csv files from 2023 that were taken with my template 7 a mutch more general targeted template simular to yours.
ps not actualy looked at them just seen your request (so whats wrong with my engine that I dont know about)
To aid diagnosis of the turbo use a technique known as "wide open throttle pull"
warm engine then clear road and hold in 2nd or 3rd and plant the throtle to floor to 40000 revs then foot off untill idle and repeat (if enough road) use all turbo pids rpm,speed, pedal
