thecause17
Veteran Member
I'm fairly familiar with the expected behavior during a regen cycle, but I've noticed something about my car that just seems a little odd. All temps that I list are in degrees F, monitoring is done via an Aeroforce Interceptor scan gauge.
Passive regens in this car seem to be on par with what is expected. Highway trips exhibit temps around 650 degrees. When a real regen cycle occurs, temperatures typically from from the 950-1250 range. I have the scan gauge alarm leds set to light on temps above 950, so I know when it's happening, even if it's not a visible parameter on the gauge.
This all seems normal, but where things get confusing for me is when the car will raise its exhaust temps for very brief periods. Sometimes the I can feel the cycle kick in, and watch the temp bump up to 900-1000 degrees, then it will immediately drop back down, even when at a constant speed. I don't really understand why the car does this, other than if maybe the temps were lower than optimal so it bumps it up itself. Maybe so the DPF and NOx filters work optimally? I also noticed on my last major highway trip that it would do this around every 10-15 miles. It can be a little annoying at times because the car will stumble a little upon the start/stop of the cycle. This isn't what I know as a passive regen, as the car doesn't initiate that, but these little bumps are clearly caused by the car's computer. Boost will increase at these times as with a regen cycle as well, only it's not really going through a full cycle.
Has anyone else noticed this? Is it normal? The car runs fine otherwise, mileage is good, power is good. I just feel like it's always doing this. I'd say just about every time I drive the car it will do it at least once.
Passive regens in this car seem to be on par with what is expected. Highway trips exhibit temps around 650 degrees. When a real regen cycle occurs, temperatures typically from from the 950-1250 range. I have the scan gauge alarm leds set to light on temps above 950, so I know when it's happening, even if it's not a visible parameter on the gauge.
This all seems normal, but where things get confusing for me is when the car will raise its exhaust temps for very brief periods. Sometimes the I can feel the cycle kick in, and watch the temp bump up to 900-1000 degrees, then it will immediately drop back down, even when at a constant speed. I don't really understand why the car does this, other than if maybe the temps were lower than optimal so it bumps it up itself. Maybe so the DPF and NOx filters work optimally? I also noticed on my last major highway trip that it would do this around every 10-15 miles. It can be a little annoying at times because the car will stumble a little upon the start/stop of the cycle. This isn't what I know as a passive regen, as the car doesn't initiate that, but these little bumps are clearly caused by the car's computer. Boost will increase at these times as with a regen cycle as well, only it's not really going through a full cycle.
Has anyone else noticed this? Is it normal? The car runs fine otherwise, mileage is good, power is good. I just feel like it's always doing this. I'd say just about every time I drive the car it will do it at least once.
