DPF Regeneration

Cerco

I have read here about DPF regenerating on long journeys. How do you tell when regeneration is happening? Are there any obvious indications?

Is there an easy way to force regeneration if you are doing a lot of short trips? Do you need high revs or is along journey sufficient?

Thanks,
Cerco

pred racer

You will know it regenerating when

A. Your l/100km rises drastically (or mpg rises)
B. on an alfa the engine rumbles quite a bit and it feels lumpy.
C. If you have a boost gauge it will drop like a stone when you take your foot off the gas.
D. If you have the window open you will smell it;)

Btw the vw ones work a little differently and you wont see all these symptoms.

To regenerate, your exhaust will have to reach a certain temperature (around 600 degrees) this normally requires a period of driving over 2k revs. A motorway spin or a spirited drive

Most cars can be forced to regen, normally by a garage, not sure if you can do it at home.

Hope this helps.

Cerco

Thanks Pred Racer, that's exactly the info I was looking for!

Jack breen

pred racer wrote: »

You will know it regenerating when

A. Your l/100km rises drastically (or mpg rises)
B. on an alfa the engine rumbles quite a bit and it feels lumpy.
C. If you have a boost gauge it will drop like a stone when you take your foot off the gas.
D. If you have the window open you will smell it;)

Btw the vw ones work a little differently and you wont see all these symptoms.

To regenerate, your exhaust will have to reach a certain temperature (around 600 degrees) this normally requires a period of driving over 2k revs. A motorway spin or a spirited drive

Most cars can be forced to regen, normally by a garage, not sure if you can do it at home.

Hope this helps.

I have often wondered this as we do a lot of short journeys. I went to Cahir from Dublin yesterday and completed the journey in 80 minutes. My revs were well above 2k at this speed so I presume it done its thing?

pred racer

Jack breen wrote: »

I have often wondered this as we do a lot of short journeys. I went to Cahir from Dublin yesterday and completed the journey in 80 minutes. My revs were well above 2k at this speed so I presume it done its thing?

If it needed it yes.

Guys, your dpf will only be badly affected by town driving if you drive like an auld one:) if youre giving it a bit of stick and going for an odd spin a bit further itll be fine. If my car needs a regen (alfa 159, it starts a bit rough and idles a bit lumpy when its getting close) and its already warmish from a drive earlier on itll get hot enough to regen in about 5-8km of decent driving, not going mental just hang onto each gear till 3.5k instead of 2.5k. On average, mine regens on every second tank of daysul, yours might be more as my car spends more than half its driving time on the motorway.

Edit: if you have a peugeot/citroen its even better, when the car needs a regen it switches on pretty much everything electric in the car to stress and heat the engine and injects a urea based fluid into the dpf to burn the soot.

Jack breen

pred racer wrote: »

If it needed it yes.

Guys, your dpf will only be badly affected by town driving if you drive like an auld one:) if youre giving it a bit of stick and going for an odd spin a bit further itll be fine. If my car needs a regen (alfa 159, it starts a bit rough and idles a bit lumpy when its getting close) and its already warmish from a drive earlier on itll get hot enough to regen in about 5-8km of decent driving, not going mental just hang onto each gear till 3.5k instead of 2.5k. On average, mine regens on every second tank of daysul, yours might be more as my car spends more than half its driving time on the motorway.

Edit: if you have a peugeot/citroen its even better, when the car needs a regen it switches on pretty much everything electric in the car to stress and heat the engine and injects a urea based fluid into the dpf to burn the soot.

Thanks for your help, its not so much the short journeys but my wife insists on warming the car every morning to have it warm but a car never warms while idling. She also drives in top gear thinking shes saving fuel so that kind of worries me.

I followed a unmarked copper yesterday all the way down so I made great time!