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Old 02-03-2009   #16
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Question Re: doblo particulate filter

[quote=NottsCharger;1967312]The DPF or rather the lack of one was my particular reason for buying a 105bhp model Doblo. I have had bad experience with a late model Stilo with a dpf and also an Audi A4 which became a total disaster because of the dpf.




Having recently bought a 105hp doblo dynamic (which i am very pleased with) I was pleased and somewhat relieved to read the above post.

Just wondered why there is no pdf on this model when it appears to be fitted on numerous other diesel powered cars?
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Old 03-03-2009   #17
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Re: doblo particulate filter

[quote=dobload;1974016]
Quote Originally Posted by NottsCharger View Post
The DPF or rather the lack of one was my particular reason for buying a 105bhp model Doblo. I have had bad experience with a late model Stilo with a dpf and also an Audi A4 which became a total disaster because of the dpf.
Quote Originally Posted by NottsCharger View Post




Having recently bought a 105hp doblo dynamic (which i am very pleased with) I was pleased and somewhat relieved to read the above post.

Just wondered why there is no pdf on this model when it appears to be fitted on numerous other diesel powered cars?
my 105bhp 06 cargo also does NOT have the DPF fitted.

The 105bhp 1.9 8v multijet in the Doblo has a fixed geometry turbo and therfore no DPF fitted ,the same for earlier 75bhp 1.3 16v multijet versions with fixed geometry turbos.

The later 85bhp 1.3 16v multijet and 120bhp 1.9 8v multijet versions have a variable geometry turbo ( VGT ) allowing for the increases in power both these engine units have a DPF fitted.

So if you are concerned buy the 105bhp 1.9 or earlier 75bhp 1.3 versions.

we wil all soon have no choice as the new 1,6 multijets and current 1.3's have DPFs so keep hold of your old dobbies
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Old 03-03-2009   #18
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Re: doblo particulate filter

Quote Originally Posted by NumanR View Post
Forced regeration, ok, natural regeneration occurs when certain circumstances occur during driving, cruising with a hot engine etc etc. If those circumstances do not happen (short journeys, city driving etc etc) then the system cannot clean that dpf, so after monitoring the pressure in the dpf the warning light comes on and it goes to your dealer.

The dealer checks through everything and then carries out a forced regeneration using examiner. They stick the car outside or up on a ramp (you need as much cold air as possible around the dpf) and if inside fit a remote exhaust extractor (if you fit it directly to the exhaust it would melt). Secure an area around the car so no one gets too close, and start the regeration, the engine has to be hot, no pedals pressed and a load on the engine (lights etc). Examiner revs the engine to 2000 rpm and monitors the parameters to make sure its safe to do a regen. After this check, the engine is then revved to 3000 rpm and regen starts, it takes approx 15 minutes and sparks and soot are ejected from the exhaust. The injection period is extended and post injection occurs which super heats the exhaust and dpf, raising the temperature to between 600 and 800 degrees c, burning off the particulates that are trapped in the filter. After regen has occurred the vehicle is driven hard to flush out as much soot as possible, typically the pressure difference between before and after regen in the dpf goes from 150 mbars to 10 mbars at idle. This pressure difference increases as the revs are raised.

Thanks for the above - sounds an awful lot to a dpf and the heat on regeneration is awesome

Is there a way of telling when the engine is regenerating naturally - I would hate to stop and step in line of the exhaust at the relevant time !!!
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Old 03-03-2009   #19
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Re: doblo particulate filter

[QUOTE=chrisb100;1974821][quote=dobload;1974016][COLOR="RoyalBlue"]


The 105bhp 1.9 8v multijet in the Doblo has a fixed geometry turbo and therfore no DPF fitted ,the same for earlier 75bhp 1.3 16v multijet versions with fixed geometry turbos.


Chris, does this mean that the 105bhp has a bog standard exhaust system which would be (relatively) cheap and easy to replace compared to a DPF?



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Old 04-03-2009   #20
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Re: doblo particulate filter

Yes apart from the cat its billy basic!
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Old 24-02-2011   #21
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Re: blocked doblo particulate filter !!!

hi ,please help im fearful to tell customer of 'my' diagnosis when a dpf is being quoted at 1910 by fiat dealer . on monday code for egr valve showed up ,vehicle went into limp home mode, i cleared code and monitored, tuesday vehicle went into limp mode again,this time code said dpf threshold ,i checked egr valve and it was full of soot ,i cleaned it and carried out regeneration,road tested and all seemed fine, after about 50 miles,car parked overnight in morning after starting car slowed right down and stalled would not restart,when back at workshop, car did not want to start,checked actuation of egr valve ,it opened about 2mm ,started car with egr to inlet pipe disconnected and it run ok.tried to regenerate dpf again but said dpf is blocked and needs changing !!!! am i doing things wrong ? or anyone had the bottle to change one .doblo 1.9 jtd 08 plate
ty
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Old 24-02-2011   #22
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Re: doblo particulate filter

mileage?

has oil deg counter even been reset?
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Old 24-02-2011   #23
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Re: doblo particulate filter

56000 oil deg done about 2 weeks ago ty
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Old 24-02-2011   #24
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Re: doblo particulate filter

i'd take a closer look at that egr before even considering the dpf


(oil level?)
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Old 25-02-2011   #25
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Re: doblo particulate filter

oil level was ilttle high ,drained ,could this cause the problem ? also how far should egr open on actuator test ? ty
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Last edited by richpassi; 25-02-2011 at 11:19.
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Old 26-02-2011   #26
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Re: doblo particulate filter

oil level will rise if regeneration cannot be carried out,there isa update for the 1.9 dpf models.
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Old 27-02-2011   #27
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Re: doblo particulate filter

regeneration carried out,been on a 225 mile run, seems to be good at moment ,fingers crossed ,all the best
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Old 27-02-2011   #28
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Re: doblo particulate filter

Quote Originally Posted by T14086 View Post
oil level will rise if regeneration cannot be carried out,there isa update for the 1.9 dpf models.
whats update
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Old 14-04-2011   #29
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Re: blocked doblo particulate filter !!!

Quote Originally Posted by richpassi View Post
hi ,please help im fearful to tell customer of 'my' diagnosis when a dpf is being quoted at 1910 by fiat dealer . on monday code for egr valve showed up ,vehicle went into limp home mode, i cleared code and monitored, tuesday vehicle went into limp mode again,this time code said dpf threshold ,i checked egr valve and it was full of soot ,i cleaned it and carried out regeneration,road tested and all seemed fine, after about 50 miles,car parked overnight in morning after starting car slowed right down and stalled would not restart,when back at workshop, car did not want to start,checked actuation of egr valve ,it opened about 2mm ,started car with egr to inlet pipe disconnected and it run ok.tried to regenerate dpf again but said dpf is blocked and needs changing !!!! am i doing things wrong ? or anyone had the bottle to change one .doblo 1.9 jtd 08 plate
ty
Hi there just thought i would let you know that i`ve had a call from a local garage today with a 57 plate doblo 1.9jtd doing the exact same fault as you have described, so i thought i would run through my diagnosis and maybe it might help yourself and others ?

The car cut out and when restarted was very restricted on power, fault read and came up with the egr valve fault. I stripped and cleaned egr valve (very sooty) actuated on laptop and valve would`nt move on test so tapped valve while actuating and it would move intermittent approx 4mm off seat then jam up again. Garage agreed and quickly fitted new egr valve car now started and ran a little better.

Still restricted and now came up with fault code p1206 - Clean replace particulate (oil degradation re-set was at 80% so ruled out) particulate in parameters was 136% blocked so tried a forced Regen and it would`nt complete it started revving then aborted. Put up on ramp and removed dpf and found it heavily blocked tried to clean but was fighting a uphill battle. Garage fetched new dpf from Andrew page 380.00 +vat, fitted dpf and went into adjustments and cleared dpf settings and told car new one fitted and car now run 100% better.

Road tested car and the dreaded light came on again code read and came up with 2 fault codes P1206-clean replace particulate and P0238-turbo pressure. i checked the dpf readings on live data and found the dpf temp was 30-50 degrees lower than the pre cat temp which i deemed as normal but what was odd is that the differential pressure sensor was running at 86mbar on idle after the road test. i thought this was very high and would expect to see about 10-15mbar. That aside i decided to chase the turbo fault so back at the inlet manifold i took the MAF sensor out and hey presto found it blocked with soot. Cleaned with contact cleaner and gently picked clean with probe and re-fitted. Cleared all fault codes and car now sounded awesome performed forced Regen and it did not hesitate and went straight up on the revs and completed with no faults this time.

The Differential pressure sensor now read at 11-13mbar on idle and when now revved up was very responsive so road tested and it flew. Customer drove and said its the best its ever run and problem has not happened since, what i did`nt mention is that this doblo was a town taxi and has done 96000 miles so thus the reason it was heavily blocked up.

I think if some people get to the egr and maf sensor blockage quicker they might be able to save there dpf unit and also have a easy repair, If this helps yourself or anyone else please let me know.

cheers chris
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Old 15-04-2011   #30
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Re: blocked doblo particulate filter !!!

Quote Originally Posted by forrest159 View Post

I think if some people get to the egr and maf sensor blockage quicker they might be able to save there dpf unit and also have a easy repair, If this helps yourself or anyone else please let me know.

cheers chris
Chris,

well done with this one - it all makes a lot of sense to me
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