DPF Regen

[TX_Ovrlnd]

Well, If you are going to obsess over regens....you might as well throw the monitoring of EGTs also...might as well be full OCD.

Good thing these modules monitor several variables at once!!

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[rickinAZ]

I was on the Rubicon and got stuck idling a lot for a couple of days. I got the message that a re-gen was needed so I put it in park and set the rpm's at 2000 for about 10 minutes and the re-gen worked. A diesel JT that was with me ignored the message and ended up in limp mode after we left the trail.

Dave, I've never seen the "regen needed" message. Did it come on at 80%, or was it the result of the soot approaching 100% (due to being shut off during regen several times on the trail)?

I'm like @Tread4Lo. I try to avoid shutting off the engine when the DPF is in the high 70s. I don't consider that obsessive either; just diligent, and sensitive to my equipment. I'm also anal about keeping the fuel tank no less than a quarter full in deference to fuel pump starvation.

 

[Dasher320]

Dave, I've never seen the "regen needed" message. Did it come on at 80%, or was it the result of the soot approaching 100% (due to being shut off during regen several times on the trail)?

I'm like @Tread4Lo. I try to avoid shutting of the engine when the DPF is in the high 70s. I don't consider that obsessive either; just diligent, and sensitive to my equipment.

It was the message saying DPF near 100%. Not much chance to run highway speeds for 20 minutes on the Rubicon. Just putting this method out there if you get stuck in this situation.

 

[rickinAZ]

It was the message saying DPF near 100%. Not much chance to run highway speeds for 20 minutes on the Rubicon. Just putting this method out there if you get stuck in this situation.

Here is another option for forcing a regen. I carry mine with me in my travels.
https://www.jlwranglerforums.com/fo...-regen-accomplished-on-jeep-jl-diesel.104228/

 

[J.Ferreira]

Does the message go away when regeneration is complete? Or when it is no longer urgent/important to keep driving? Meaning if the DPF alert level is at 70% and my DPF is at 85% (triggering the warning), if the message goes away, is it back to 70%? What would it take to get it to 0? Or at least lower than 20%

I have read what Gorilla57 said above, that you can get a ScanGauge to tell you. I just didn't know if there was an easier way to know or if this was a mystery.

If you can't tell, this is my first Diesel engine, as well as my first Wrangler.

I appreciate everyone's patience.

Wait what is DPF?
I know that DEF is Diesel Exhaust Fluid, I've never heard of this DPF though.
Non-diesel guy just checking out the trending threads.

 

[SonofaSeabee]

Wait what is DPF?
I know that DEF is Diesel Exhaust Fluid, I've never heard of this DPF though.
Non-diesel guy just checking out the trending threads.

Diesel Particulate Filter

 

[rickinAZ]

Wait what is DPF?
I know that DEF is Diesel Exhaust Fluid, I've never heard of this DPF though.
Non-diesel guy just checking out the trending threads.

DPFs are why modern diesels don't blow black smoke. They capture soot and burn it off using high heat. If you drive longer distances, the heat from your exhaust will burn off the soot - called "passive" regeneration. Otherwise, when the DFP gets to 80% full, extra fuel is injected to create the heat used in the process - called "active" regeneration. A third method, "forced" regeneration, is the one that I depicted in post #49.

 

[Dasher320]

Here is another option for forcing a regen. I carry mine with me in my travels.
https://www.jlwranglerforums.com/fo...-regen-accomplished-on-jeep-jl-diesel.104228/

That’s good info. I didn’t know about this—may be getting that in the near future. There are times I would love to know I’m starting with a clean DPF. (diesel particulate filter for the guy who was asking, one more piece of emissions crap I would love to lose)

 

[AZDIESELRUBI]

Good thing these modules monitor several variables at once!!

A stock diesel engine will never allow you to get to unsafe EGTs. The computer will derate you before that happens.

You would never need to monitor EGT unless you are tuned and deleted.

 

[TX_Ovrlnd]

Here is another option for forcing a regen. I carry mine with me in my travels.
https://www.jlwranglerforums.com/fo...-regen-accomplished-on-jeep-jl-diesel.104228/

Is this the one you bought? https://www.amazon.com/FOXWELL-Diagnostic-Chrysler-Maintenance-Functions/dp/B07XK1P8ZT

 

[Industrialwrench]

So I don’t have the diesel in my Jeep, But I do have a newer diesel Kubota tractor that has regen cycles. Not sure if Jeep engineers did it the same, but my tractor regen is variable based off how I use it. Short usage with low throttle and low heat generation adds up to more regen cycles. If I’m out working for an hour straight at high RPM consecutively everyday it will never call for a regen. If that’s the case a lead foot might help? Idk the tractor has a hydrostatic auto tranny with L/M/H gear selection and an optional manual clutch. I can peg the throttle and still drive slow if I want. Jeep should give the automatic guys that kinda control. They do that and I’ll switch to an auto and a diesel today. Sorry for the rant

 

[TX_Ovrlnd]

So I don’t have the diesel in my Jeep, But I do have a newer diesel Kubota tractor that has regen cycles. Not sure if Jeep engineers did it the same, but my tractor regen is variable based off how I use it. Short usage with low throttle and low heat generation adds up to more regen cycles. If I’m out working for an hour straight at high RPM consecutively everyday it will never call for a regen. If that’s the case a lead foot might help? Idk the tractor has a hydrostatic auto tranny with L/M/H gear selection and an optional manual clutch. I can peg the throttle and still drive slow if I want. Jeep should give the automatic guys that kinda control. They do that and I’ll switch to an auto and a diesel today. Sorry for the rant

It kind of works that way, prolonged use at hwy speeds will keep EGTs higher and burn off more soot causing less regen cycles because the DPF isn’t measuring as high a %.

 

[rickinAZ]

Is this the one you bought? https://www.amazon.com/FOXWELL-Diagnostic-Chrysler-Maintenance-Functions/dp/B07XK1P8ZT

Yes. That's the exact one.

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