HumbleSmoker
banned, trolling, using aliases
Raised idle after cold start because its heating up the DOC/DPF Monolith as quickly as possible to keep emissions down.
I may have had my first experience witnessing a regen. I just pulled off the highway so my wife could pick up the mail. While she was gone, I opened up the driver's door and could hear the engine idling with some vigour. I looked at the tach it was idling at 950. I could detect a faint whiff of a hot dieselly smell.DoctorDawg said:Beetle98, I would guess that the fan was involved in a regen. I know that when I've shut down during a regen, after starting and stopping the engine again the fan would go off (just like you report).
I haven't mentioned this before, but my nose can detect a very slight, but quite distinct smell associated with regens. Smells like the tiniest whiff of bleach - not strong, just subtle. Maybe its just 'hot metal' smell, I don't know, but its distinctive.
On my '09, at least, regens happen every 300 mi. like clockwork. I suspect this is the ECU's default behavior, so I'm not sure that monitoring regens will tell you anything.nesdon said:Seems like monitoring regen could get hard data on this, and that B99 could make up for some of its energy density deficit by reduced regen cycles.
I guess I misunderstood this comment. It sounds like regens are calculated by the ECU, I presumed based on pressure differential across the filter.And I absolutely agree with you, Otto; at one regen per 2K miles,
I think I have nailed down a possible "regen" indicator. Block 105,2 is currently called requested regens. I think it is really a DPF state indicator where:newbury said:I would probably go buy a VagCom and a small laptop just to monitor my JSW if I could be sure to find out in advance when a regen was probable.
Based on earlier posts in this thread it looks like 320 to 400 miles is a limit. My quandry is determining the last regen.
I've a range of vehicles to drive and if for example I knew a regen was due I'd hold off driving the JSW for short trips.
As mentionted before in this thread, TSB issued that says it is normal.Jeffmx5 said:My wife and I are enjoying her new Jetta. We have had the fans come on when we shut the car down at least 4 or 5 times.
Has anyone had the fans come on when the shut the motor off and then had the fans shut off by themselves?
I've experienced re-gen events about 3x so far. I know its happening whennewbury said:I would probably go buy a VagCom and a small laptop just to monitor my JSW if I could be sure to find out in advance when a regen was probable.
You dont need to go through all that trouble, why not just monitor the two EGT's already in place?b61mk11 said:Rather than Vag-Comming and watching the event stream - wouldnt it
make MORE sense to install some thermocouples in your engine compt and
monitor temperatures? You'll definitely know when a Regen is happening if you put a thermocouple near the DPF - just watch for temp excursions far above baseline. I'd also like to know JUST HOW HOT it makes neighboring
components.
-- Jim
It isn't the same type of system. The VW system, along with M-B, Audi and BMW are all the same on the SMALLER engines, but once you ramp up to the larger engines, (Touraeg) the system is then completely different. The F350 is a LARGE diesel, and it is certainly not in a class of "clean and green" such as what we enjoy.Rock77 said:I was in my friends Ford F350 Superduty last week, as we were driving I glanced over at his gauges and noticed it said "cleaning exhaust filter" on his info display. He told me this means keep driving and don't shut'er down. It stayed on for about 3 minutes. Why don't the Tdi's have this?
And installing a light in the instrument cluster that lights up every few hundred miles works against VW's goal of trying to make the TDI mainstream. The average buyer will have a hard enough time figuring out that they have to wait until the glowplug light goes out to start the car. The new TDI tries very hard to disguise it's "diesel-ness".DoctorDawg said:Still, the point is well taken. It would be great to have either an idiot light or an MFD message indicating a regen in progress. Of course, if this existed then a lot of folks who don't read their manuals or get to know their cars would be taking them in for service every time that light went on.
Exactly. Even if you do shut the engine off during a regen cycle, the cycle will continue the next time the car is started and certain criteria are met (e.g. coolant temp, EGT, etc.). Only if the DPF becomes clogged (from various circumstances) does the owner need to drive around with engine RPM in a certain range to force a regen. But, this is not a typical situation and not something that will typically happen or be required.DPM said:^^ agree. You only need to know, if you want to know. I's love the Subie to tell me when it's doing a regen (I can monitor it manually with Scangauge, closed intake TPS= regen). But only because of a slight hesitation going to WOT which has caught me out at the beginning of an overtake a few times...