doblo 1.9 jtd dpf blocked !!!

[richpassi]

hi ,new to forum,found program to be well good,but am so 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 andc 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 .ty

[s130]

Just guessing here, but if you can't get it to regenerate at all then before replacing you could try cleaning the filter.

I've heard/seen on the Internet that a careful compressed air clean or jet wash clean can recover a filter sufficiently to allow the regeneration process to be done when it is put back on the car.

BEFORE doing the above I would carefully check that all sensors, wires, vacuum tubes are intact/ok just in case there is a problem with these that is causing the problem.

[richpassi]

checked all out as best as possible,took dpf off to look at (sad i know lol) did blow out with compressed air (also put a little diesel in it too) left it over night refitted in the morning ,restarted and when the smoke cleared !!!! (when lol) took in on road test, it smoked some more,then allowed me to do a regeration,after it said 80% blocked ,but run fine, i have just done a 170 mile hard drive, after it read 17% ,could not resist doing another regeration after which it says 80% again do feel that if i went on another run it would resettle to lower as it feels fine,is this usual ,ty

[s130]

Well it sounds like you made soem progess. I've no idea about it going form 17% to 80% after a forced regen.

I would get some miles on the car and see how it goes. You may have confused the system by doing a forced regen at only 17% clogging.

[richpassi]

feel the same to on the confusion bit,went for short drive today now back to 40% blocked still feels ok ,so will monitor and post in a while ,all the best

[raf schils]

Here is how i do a car with that problem, feultank 10 Liters diesel in it powercleaner for petrol engine abb. 200 ml, drive for 20 km on 3500 rpm than fully tank diesel with 0.5 liters of ATF III in tank after 300 km driving on 3000 rpm and more filter is fully clean !!
take the filter off you will see !
Greatings Raf.

[bas]

powercleaner for petrol engine abb. 200 ml

In the case of diesel engine using gasoline additive?
Should not use the additive for diesel engine?

BAS

[alin13mad]

hi ,new to forum,found program to be well good,but am so 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 andc 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 .ty

You have reset "service oil change",and after can tried to regenerate dpf again.

[forrest159]

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 dpf fault.

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.

cheers chris