gdallas
10-09-2013, 07:33 PM
Couple of queries here!
Have been becoming concerned that my car has forgotten how to regen. Could be my OCD! Lol was sitting at 24g the other day, which I felt was rather high. Just so happened to bee working in Aberdeen today, which meant a 100mile each way up the A90 at 75-79mph. for the first half hour I drove in 4th to keep th revs over 2k. when I arrived home, I measured the soot, it was only blooming at 10g! and this is where my ocd may be kicking in, doesn’t this seem high, following a large journey like that?
some hours later I strapped on the vcds and took it up the motorway for 20 mins, I watched in realtime the soot go all the way down to 1.91g then it kinda bottomed out. What I noticed tho was as I arrived at junction, or whacked it on neutral, any time where there was very low revs, the measured soot began to climb farily rapidly actually. And within a 10 seconds, maybe about 2g. is this normal?
Now, my ignorance here is with reagrds when a regen has completed, or even started, or what actually defines a regen in the first place. I’ve measuring my soot a lot recently, it looks as though my car continuously burns off soot when the conditions are right, i.e. about approx. +2k revs where the exhaust gas temp must be sufficient to burn it off. However, as far as I can glean from my experiments, although my car appears to be continuously regenerating, it only appears to regenerate IF the soot levels fall below a particular low level as my “time/distance since last regen” status is still of large values.
Now I’m particularly concerned as I would have assumed a 2.5 hours journey each way to Aberdeen on a 70 should have “regenerated” the dpf, like completely? That and the fact why soot levels climb back up rapidly scares me a little!
It may be related to me not having adapted my dpf sensor, but im not sure
Have been becoming concerned that my car has forgotten how to regen. Could be my OCD! Lol was sitting at 24g the other day, which I felt was rather high. Just so happened to bee working in Aberdeen today, which meant a 100mile each way up the A90 at 75-79mph. for the first half hour I drove in 4th to keep th revs over 2k. when I arrived home, I measured the soot, it was only blooming at 10g! and this is where my ocd may be kicking in, doesn’t this seem high, following a large journey like that?
some hours later I strapped on the vcds and took it up the motorway for 20 mins, I watched in realtime the soot go all the way down to 1.91g then it kinda bottomed out. What I noticed tho was as I arrived at junction, or whacked it on neutral, any time where there was very low revs, the measured soot began to climb farily rapidly actually. And within a 10 seconds, maybe about 2g. is this normal?
Now, my ignorance here is with reagrds when a regen has completed, or even started, or what actually defines a regen in the first place. I’ve measuring my soot a lot recently, it looks as though my car continuously burns off soot when the conditions are right, i.e. about approx. +2k revs where the exhaust gas temp must be sufficient to burn it off. However, as far as I can glean from my experiments, although my car appears to be continuously regenerating, it only appears to regenerate IF the soot levels fall below a particular low level as my “time/distance since last regen” status is still of large values.
Now I’m particularly concerned as I would have assumed a 2.5 hours journey each way to Aberdeen on a 70 should have “regenerated” the dpf, like completely? That and the fact why soot levels climb back up rapidly scares me a little!
It may be related to me not having adapted my dpf sensor, but im not sure