Fiat 500 multijet 1.3 Diesel blowing white smoke

Home Forums Life & Stuff … Cars Fiat 500 multijet 1.3 Diesel blowing white smoke

Viewing 10 posts - 1 through 10 (of 10 total)
  • Author
    Posts
  • #14340
    UK Sentinel
    Moderator
    • Posts 3397
    • Skipper

    So my daughter returned from UNI and mentioned that her Fiat 500 Diesel Multijet sometimes blows white smoke whilst driving or at start up (maybe).

    So I thought I would create a log of what I do to see what the issues might be .

    White Smoke usually means either unburnt fuel or a water issue

    Grey smoke is a little more interesting

    Black Smoke usually means to much fuel being burnt (rich mixture)or Air flow restriction

    Blue Smoke means the engine is burning oil.

     

     

    In a completely sane world, madness is the only freedom (J.G.Ballard).

    #14341
    UK Sentinel
    Moderator
    • Posts 3397
    • Skipper

    So I have checked the Water level and that is as it should be, I have also checked the Oil level and that is a little over the max level which I over filled from previous top up last year.

    Now to check the dashboard for any warning lights and double check Smoke is actually white and not Grey which could mean a little oil is leaking (overflowing) into fuel delivery system causing issues maybe for the diesel particulate filter (DPF) / catalytic converter being blocking or the Lambda Sensor or simular needing a clean etc.

    In a completely sane world, madness is the only freedom (J.G.Ballard).

    #14343
    Grisu
    Participant
    • Posts 445
    • Addict

    FIAT: Failed Italian Automotive Technology or Fix It Again Tony

    #14344
    UK Sentinel
    Moderator
    • Posts 3397
    • Skipper

    FIAT: Failed Italian Automotive Technology or Fix It Again Tony

    har har but back to getting the FIAT 500 working as it was intended. (Fixed It And Tested)

    In a completely sane world, madness is the only freedom (J.G.Ballard).

    #14357
    UK Sentinel
    Moderator
    • Posts 3397
    • Skipper

    So the Fiat 500 had no warning lights on the dashboard and no visible exhaust smoke (white or black) was observed when the car cold starts in the  morning and drives away .

    Will test again after it rains overnight as water condensation or the known water leak from the wiper  blades  grill could be dripping water onto the air filter  housing and maybe making the air filter damp and causing white smoke.

    But good news that no water or oil  is finding its way into the cylinder block over night .

    Time to dig out my ODB11 Fault code reader and see if that gives any clues ?

     

     

    In a completely sane world, madness is the only freedom (J.G.Ballard).

    #14394
    UK Sentinel
    Moderator
    • Posts 3397
    • Skipper

    Still waiting for that rainy day / night – trust us to be in the middle of a heatwave.

    The Fiat 500’s  Diesel Particulate Filter (DPF) dashboard warning light came on today, but alas came on as my daughter arrived home,

    So good news the DPF seems to indicate it needs a clean / regeneration  (a proper good run) and hopefully this could be the main reason for white smoke appearing from time to time as a DPF as part of the cleaning process uses extra fuel to help burn of soot deposits (ash) in the DPF as part of the self clean process, I am slowly drawing to the conclusion that the regens are never allowed to finish.

     

    https://en.wikipedia.org/wiki/Diesel_particulate_filter

    In a completely sane world, madness is the only freedom (J.G.Ballard).

    #14402
    UK Sentinel
    Moderator
    • Posts 3397
    • Skipper

    Well this morning the Fiat 500 Diesel Particulate Filter (DPF) warning light came on, the car cold started and white smoke came out from the exhaust, so seems that Fiat DPF was not allowed to finish its regeneration cycle yesterday, it decided to keep pumping in the extra fuel this morning even when the engine and exhaust is still cold which is not good.

    In a completely sane world, madness is the only freedom (J.G.Ballard).

    #14403
    Grisu
    Participant
    • Posts 445
    • Addict

    But cleaning (burning/regeneration) is done only when the engine is warm (>60°C) and must not start while still cold.
    You should bring it to repair, quite sure some sensor gives wrong messurements or something like this.

    • This reply was modified 4 days ago by Grisu.
    • This reply was modified 4 days ago by Grisu.
    #14406
    UK Sentinel
    Moderator
    • Posts 3397
    • Skipper

    Totally agree, regens should only occur when engine and exhaust are upto temperature,  hopefully the DPF needs a good run to clear out the soot etc. Otherwise remove the DPF  from car and cleaned. I plan to plug in my ODB11 Fault code reader this week to see if indeed any faults (sensors – injectors ) are identified also.

    (it is a Fiat)  but does look good

    For anybody else reading this thread, – If you ever have the message ‘antipollution filter clogged‘ this means that the DPF Regeneration process has been interrupted 3 times before it has completed its cycle (engine turned off) and usually a 20 minute drive on the motorway at high revs will allow a DPF regen to be fully completed.

    In a completely sane world, madness is the only freedom (J.G.Ballard).

    #14473
    UK Sentinel
    Moderator
    • Posts 3397
    • Skipper

    So I plugged in my Autel 519 OBD2 Reader this morning and no fault (Permanent) codes where identified, the Autel 519 did identify DPF had a flow restriction problem and an Fiat Specific code was also show $80 which after Googling seems to relate to EGR valve .

    The DPF warning light is still showing so looking most lightly a DPF / Regen / Clean DPF issue.

    Time to order a bottle of STP  (Diesel Particulate Filter Cleaner) and a Spray can of Wynns Diesel EGR and Air Intake Cleaner, to see if a good run and spraying the Air intake hose (beyond the air filter) will bring the Fiat back to a normal running condition 

    In a completely sane world, madness is the only freedom (J.G.Ballard).

Viewing 10 posts - 1 through 10 (of 10 total)
  • You must be logged in to reply to this topic.
UKTechHub.com