Dismal DPF!

[Grizzy]

Just wondering, how bad was your economy? When I had mine I had about 9L/100km on highway and about 11-12L/100km. IMO that's pretty bad for a diesel, considering my Citroen DS3 gets about 8-9L/100km even with its rev-happy 1.6 petrol engine and rather ancient 4-speed slushbox.

I was also advised to get the DPF sensor looked at too.

My economy is around those figures also, and lets face it, they are not great. The reason i haven't been too concerned with the economy as yet, is im getting more bang for my buck then i was with my previous vehicle (dodgy Nissan). So im saving money, but maybe not as much as i should be?

Did you manage to get your DPF sensor looked at? When you were advised?

[kaanage]

Just wondering, how bad was your economy? When I had mine I had about 9L/100km on highway and about 11-12L/100km. IMO that's pretty bad for a diesel, considering my Citroen DS3 gets about 8-9L/100km even with its rev-happy 1.6 petrol engine and rather ancient 4-speed slushbox.

I was also advised to get the DPF sensor looked at too.

My economy is around those figures also, and lets face it, they are not great. The reason i haven't been too concerned with the economy as yet, is im getting more bang for my buck then i was with my previous vehicle (dodgy Nissan). So im saving money, but maybe not as much as i should be?

That can't be right! Your TDi's are using over DOUBLE what the older 1.9 PD TDi 9N3 Polo uses.
Something is seriously faulty with those CR 1.6 TDi engines (in your cases, at least).

[Grizzy]

I am about 10 minutes away from going for a drive. I think this calls for some research!

Will update you all with some figures when i get back

---------- Post added at 01:56 PM ---------- Previous post was at 12:52 PM ----------

Alright, test results are in.

So from the get go economy was averaging around 10L/100km around town. Then after fiddling around with the Combi Instrument's OK/RESET button (thus resetting the counter), the figures dropped to around 6.5L/100km. Which are figures i expect from the 66TDI. Im guessing highway driving would be about 3/4's worth of that?

Are the figures i was presented with at the start an accumulation of averages from the day i bought the car? So all that was required was to reset the counter to get a true reading of my fuel consumption? Or is my Polo suffering from Polio

[BluChris]

If the trip is like my Skoda Octavia (expect it is), you have an instant, a short term and a long term fuel use display. Instant changes constantly. Short term is for the current trip only and resets after about 2 hours idle from memory. Long term average is just that, unless you reset it of course.

Your previous figures sounded terrible to me, given my Octy is much bigger and has the old school 1.9 TDI. Long term average is 6.6 comprising vast majority of commuting K's. Suburban trips tend to range from 7.5 down to 5.8 depending on traffic, +1 - 1.5 with AC on. So I would have thought your most recent posted figs are more like it.

On the other hand if you do lots of short trips/heavy traffic it will be bad, like any car. Worst case stuck fast in impossible traffic I have seen north of 30 l/100 on the short term readout. I somehow find that perversely hilarious...

[Gigitt]

something is definately wrong.
My Mk5 Jetta CR2.0 125TDI is returning 4.5l/100km Highway and about 6-6.5l/100km in the city (13,700km on odo)

[Transporter]

I am about 10 minutes away from going for a drive. I think this calls for some research!

Will update you all with some figures when i get back

---------- Post added at 01:56 PM ---------- Previous post was at 12:52 PM ----------

Alright, test results are in.

So from the get go economy was averaging around 10L/100km around town. Then after fiddling around with the Combi Instrument's OK/RESET button (thus resetting the counter), the figures dropped to around 6.5L/100km. Which are figures i expect from the 66TDI. Im guessing highway driving would be about 3/4's worth of that?

Are the figures i was presented with at the start an accumulation of averages from the day i bought the car? So all that was required was to reset the counter to get a true reading of my fuel consumption? Or is my Polo suffering from Polio

The best way to check the fuel consumption is from the fuel docket.

[kaanage]

The best way to check the fuel consumption is from the fuel docket.

Yes, but you can also use this to calibrate your MFD by resetting the long term trip computer each time you refill fully and compare the long term MFD consumption reading against actual consumption. Then you can at least have some confidence in the short term readings (and even more in the long term readings).

So from the get go economy was averaging around 10L/100km around town. Then after fiddling around with the Combi Instrument's OK/RESET button (thus resetting the counter), the figures dropped to around 6.5L/100km. Which are figures i expect from the 66TDI. (

Grizzy, if you've never reset your long term trip readings and that was what you were reading, then that's still terrible no matter how inaccurate your MFD is (they tend to be about 10% optimistic). If that was your short term reading and you'd driven within the last 2 hours, it's still not a great figure unless you were stuck in bad traffic earlier.

[Greg Roles]

Yep this particular model seems to cop the worst DPF problems. Things to help are to use good fuel from the top three brands, avoid short runs, use Morleys smoke killer, and install a Provent if you can squeeze it in somewhere! If any of you guys are in Brisbane, I want to have a good look at one of these once Carformance is set up properly around July. Like to work on fitting a catch can, and do some testing on the DPF setup. They sure seem to suffer more that they should.

My gut feel is the DPF is either too small, or too far removed and not getting hot enough passively.

Oh and those differential pressure valves are dodgy at best.....They do need to be calibrated once fitted in Vag Com chaps under advanced coding.

[Grizzy]

The best way to check the fuel consumption is from the fuel docket.

Valid point sir!

[THE_EGG]

My economy is around those figures also, and lets face it, they are not great. The reason i haven't been too concerned with the economy as yet, is im getting more bang for my buck then i was with my previous vehicle (dodgy Nissan). So im saving money, but maybe not as much as i should be?

Did you manage to get your DPF sensor looked at? When you were advised?

Nah I had too many gearbox faults to bother looking at the sensor. I was going to get it looked at once the DSG was repaired but it never was. The mechanic suggested it.

That can't be right! Your TDi's are using over DOUBLE what the older 1.9 PD TDi 9N3 Polo uses.
Something is seriously faulty with those CR 1.6 TDi engines (in your cases, at least).

LOL, my WHOLE CAR was faulty . Broken DSG too haha.