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Old 09-09-2012   #16
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Re: DPF clogged, regen failed maybe?

I agree with Keith - reset the oil change counter.

If you can't do it with the current free version of FiatEcuScan (or whatever it's called these days) then there's an older free version that can do it.

Also agree about the interval between regens. Perhaps if it decides to regen then doesn't bother because of the old oil then it still counts it as a regen. So yours keeps trying but fails to properly start (just a theory).

Did you not get any dashboard warning with the oil showing as that far degraded? Or perhaps it told the previous owner for a while then gave up.

What I don't understand is why it says 48500km (I think) to the next oil change. It should be lower if the oil's that far gone. What does your mileage read in the car if you change the scale to km using the buttons next to the steering wheel? I'm wondering what distance it has done since it last had an oil change it knew about.

I'm wondering whether the degredation is one of those that's negative even though they don't tell you - does 100% actually mean freshly changed? I've got a vague memory of something like this when I last played with mine.
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Last edited by Doofer; 09-09-2012 at 18:28.
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Old 09-09-2012   #17
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Re: DPF clogged, regen failed maybe?

ive got fully licenced paid for fes/mes
i did oil change myself and reset everything last year, its on 100,300 now
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Old 09-09-2012   #18
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Re: DPF clogged, regen failed maybe?

Any funny smells outside the car? Ours was trying to regen at very low intervals and it was down to the exhaust blowing - so the super-hot gas was actually escaping rather than clearing out the DPF.
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Old 09-09-2012   #19
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Re: DPF clogged, regen failed maybe?

no smells, i have been under car yesterday an exhaust looked sound
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Old 09-09-2012   #20
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Re: DPF clogged, regen failed maybe?

So it sounds like the car doesn't bother telling you if the oil has degraded. Is this right?
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Old 09-09-2012   #21
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Re: DPF clogged, regen failed maybe?

no message ive seen saying it has, just looking through old threads and i found out i last changed oil at 88k miles in july last year using the proper oem stuff
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Old 09-09-2012   #22
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Re: DPF clogged, regen failed maybe?

Is it the case that the `oil degradation levelí is a positive outcome - i.e. an 95% reading indicates a 5% degrade?

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Old 10-09-2012   #23
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Re: DPF clogged, regen failed maybe?

Could be, but a reset ought to show which way round the readings are.
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Old 10-09-2012   #24
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Re: DPF clogged, regen failed maybe?

fes/mes says on the screen that 100% oil thing is the start and then it counts down, but i reset it anyway, still didnt work.
drove up and down the A12 A120 for about an hour, car wont go above 3000k revs 80mph in limp mode, only managed to get temp up to 450 but when i stop that drops to 300, so still failed
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Old 10-09-2012   #25
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Re: DPF clogged, regen failed maybe?

Coming in late as I've been away.

I think you said that you had a temperature sensor replaced?

The early Croma DPF filters had TWO temeprature sensors if I remember correctly. One before the DPF box (or at front of) and one at rear of DPF box.

It is rather odd that your forced regen did not get over 600degC.

As you say something is not right.

You could try jet washing the DPF box but I suspect the problem may reoccur.

Looks like something is stopping the proper/full regen from occuring. This could be due to the ECU thinking the DPF is "end of life" and needs replacing. In this case a good jet wash AND a MultiECUScan DPF replacement proceedure may solve the problem.
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Old 10-09-2012   #26
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Re: DPF clogged, regen failed maybe?

mines a later croma 2007 on a 56 plate, jet wash a good way to clean them then? i was going to pour petrol down it
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Old 10-09-2012   #27
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Re: DPF clogged, regen failed maybe?

Mine's a 56 plate as well. But reg plate means nothing. Production date is more important and that can be obtained from ePER and chassis number.

My 56 plated Croma was produced in Sept 2005. Fiat obviously had plenty of Cromas "in stock" that were shifted at much later dates.
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Old 10-09-2012   #28
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Re: DPF clogged, regen failed maybe?

i'll pm the vin
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Old 11-09-2012   #29
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Re: DPF clogged, regen failed maybe?

there is another sensor just before the pipe to dpf, is all dirty on the wire though, thats not been replaced.

finally got dpf off today, top nut on it was rusty rounded off, was easier to remove full exhaust in the end, no rear axle so no hassle.

dpf was very heavy' blocked so much when i poured a bit of petrol through it none came out
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Old 11-09-2012   #30
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Re: DPF clogged, regen failed maybe?

Good blow job probaly won't bring a smile back to the DPF then and a good fuel & jetwash will be required.

I've just been thinking a little about this and these are they.

1) we know removing/gutting the DPF will cause a fault code to be thrown as the the differential pressures will be wrong.

2) but what if??? one didn't gut the DPF but drilled one or more straight through holes. There would still be varying differential pressures so the ECU should not throw a wobbly.

3) if, and very big IF, one could get the hole drilling and balance correct the ECU may never do a regen and never complain.

To make this work we need some detailed tech info on what the mBar pressure ranges are programmed into the ECU. To determine by trial and error would probably drive one insane!
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