56 plate DPF clean - Page 2

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Thread: 56 plate DPF clean

  1. #16

    Re: 56 plate DPF clean

    They do those blanking plates on that well known auction site .
    Look under Vauxhall vectra C , same engine
    They do sound a bit rough at first start up ,esp when cold air temperature but up where you are the ambient temperature is lower than down here so at the mo , as long as it don't misfire or cough then it's just normal diesel sound .
    MSD REGISTER 26101 NOCTURNO-BLAU-MET

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  3. #17

    Re: 56 plate DPF clean

    Just a thought but is your swirl rod still properly attached. Mine came loose causing the car to run roughly on start up. If so, replacements are available on eBay for a few quid.


    Sent from my iPad using Tapatalk

  4. #18
    Super Moderator
    Join Date
    Oct 2002
    Location
    Kippen, Stirling
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    2,679

    Re: 56 plate DPF clean

    wessel,

    I had a feeling that swirl flaps would rear their head sometime. Don't know or understand anything about them so could do with some education.

    Paul @ Kippen

  5. #19
    Saab Afficionado
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    Dec 2003
    Location
    Peterborough,Cambs,UK
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    1,125

    Re: 56 plate DPF clean

    Most of the Z19DTH inlet manifolds are well and truly gunged up to the point where you can literally spoon the goo out.
    This only becomes a real problem if the swirl flaps start to stick and the control rod comes off.
    The long term solution is either hardware ie remove/clean followed by deflap and also blank/restrciting the EGR.
    You can do the same thing more elegantly with a simple remap and avoid the hardware mod hassle and cost.

    The original Z19DTH inlet manifolds fitted to the Alfas and the Saab 1.9TD 120 didnt have them however some bright spark decided that introducing
    turbulent flow in the manifold along with 2nd burn of recirculated combustion gases would improve emissions and efficiency.
    Unfortunately the design engineers didnt consider the longer term effects of the crud build up and the additional problems that result.

    In real life removing the EGR and flaps has little effect other than the engine takes a bit more time to get to full temp

    If you remove the EGR/Throttle body and take a look it will look bad.....but it isnt the end of the world!
    https://www.youtube.com/watch?v=8dzb0xJ1PJU

    Last edited by cjapeterborough; 02-04-2018 at 06:42 PM.

  6. #20
    Saab Newbie
    Join Date
    Aug 2017
    Location
    Warwick
    Posts
    11

    Re: 56 plate DPF clean

    Had a very similar problem with my 55 plate 1.9 16 valve last summer. Had dpf cleaned professionally but limped home again after 300 miles. Turned out to be previous owner had a non genuine SAAB dpf fitted that simply did not have the capacity to run between regens without triggering the dreaded blocked dpf fault code and resulting limp home. Fitted a good second hand genuine SAAB dpf, forced regen with tech2 and problem was solved. 6000 miles later and it regens regularly on it's own. As an old SAAB technician once said to me, "you can't have champagne motoring at beer prices".

  7. #21
    Saab Afficionado
    Join Date
    Dec 2003
    Location
    Peterborough,Cambs,UK
    Posts
    1,125

    Re: 56 plate DPF clean

    Quote Originally Posted by Steverider View Post
    Had a very similar problem with my 55 plate 1.9 16 valve last summer. Had dpf cleaned professionally but limped home again after 300 miles. Turned out to be previous owner had a non genuine SAAB dpf fitted that simply did not have the capacity to run between regens without triggering the dreaded blocked dpf fault code and resulting limp home. Fitted a good second hand genuine SAAB dpf, forced regen with tech2 and problem was solved. 6000 miles later and it regens regularly on it's own. As an old SAAB technician once said to me, "you can't have champagne motoring at beer prices".
    It would be nice to know if anyone has had success with the aftermarket DPF's ...the ones on Ebay in the £200-300 range.
    I havent heard any success stories as yet and believe it is because they are not manufactured with the correct ceramics inside.

  8. #22

    Re: 56 plate DPF clean

    Post number 2 .
    From neobrothers , classed as an alternative so how good it is , I don't know
    But for £200.00 inc delivery , may well be worth a punt .
    MSD REGISTER 26101 NOCTURNO-BLAU-MET

  9. #23
    Super Moderator
    Join Date
    Oct 2002
    Location
    Kippen, Stirling
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    2,679

    Re: 56 plate DPF clean

    Guys,

    Latest update - Since it seemed very rough on cold start up I wondered if the pre-heaters were defective. Disconnected the wiring and tested the resistance. All 4 near as dammit 1 ohm, all 4 wires gave 12v for the requisite time before turning off again. Took them out one at a time. All four looked OK with a dry, heated spot on the tip.

    Thanks to kwob and lizzard-t for pointing me at the map sensor. Easy enough to remove and it just looked like black, shapeless plug. Cleaned it with carb. cleaner and a toothbrush. Now looks like something that should be there. The car now runs a bit smoother but still rough when cold. When driving, the turbo doesn't seem to come in with such a rush, the performance below 1800 rpm seems better so the difference is not so noticable.

    Might be that I'm learning how to drive a diesel after so long on the petrol engined versions but it seems that I really need to keep it above 2k and make most use of the 'box.

    Still not done the manifold vacuum 'cause I've not yet got my Pals endoscope.

    Paul @ Kippen

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