Originally Posted by Benn0
I've got 7000kms on mine, Jan2014 build. I've never seen any indication of a dpf regen on mine. Some have suggested they notice fuel consumption rise sometimes and think that may indicate a regen, but who knows.
Interesting you say that, I am wondering if there is always
a message on the EVIC when it is doing a regen where there is fuel injected by the ECU specifically to heat the exhaust.
I'm wondering if in certain situations, the car just does it without any message.
I've done about 4700km from new (30th Nov) and never had an EVIC message.
If there is no message, there is nothing to indicate to the driver than your car is "wasting fuel" heating up the exhaust. Wasting fuel is perceived as a bad thing, of course.
If a tree falls in a forest and nobody hears it, does it really fall?
If a Jeep does a regen and no message on the EVIC, does it really waste fuel?
I've been monitoring some parameters in the ECU and one of them is a "normalized DPF % full" . It's an SAE standard ECU PID value, which actually is displaying a number, but I don't know yet if its a valid reading that the Jeep actually uses.
I am also reading the CAT temp sensor and an EGT (exhaust gas temp) that appears to work.
Anyway, on Sunday i drove about 470km on the highway and had the CAT temperature displaying.
Mostly it was 250-350 C on the highway 450 C up hills.
In the evening I was cruising 110kph on the highway on a flat stretch near Pheasants nest glance down and the CAT temp is 640 C which is significantly higher than earlier.
I think it must be doing a regen, but there was no mesage on the EVIC.
I had a quick look at the fuel usage screen on the Jeep and it didn't show any significant instantaneuos increase (but the calculated display value might be offsetting not
to show the "extra" fuel injected.)
The temp stayed high 540-650 C for a few more minutes, still no message.
Later i pulled over and opened up another OBD app which can "see" the (supposed) DPF % full parameter. It reads 6%
(nearly empty). A few days before I saw it was about 50%. I think it must have done a clean and not told me.
I've been checking it since and the %value goes up a little bit on each trip that I do, even the short ones.
more data needed to see if it works, waiting for 100%