News

348 Lowering emissions

Discussion in '348/355' started by Cauf61, Jun 8, 2019.

  1. Cauf61

    Cauf61 Formula Junior
    Silver Subscribed

    Jul 12, 2016
    556
    Belgium
    Full Name:
    Patrick
    Hello

    Is there a way to , briefly, lower the Co emissions.
    This just for the time to be sure 100% to pass regulation.

    I would think increasing air flow or lowering fuel amount ??

    Grts
    Patrick
     
  2. SoCal1

    SoCal1 F1 Veteran
    Silver Subscribed Owner

    Jun 14, 2011
    7,763
    SoCal LA/OC
    Full Name:
    Tim Dee
    New catalytic converters is the easiest way
     
    johnk... likes this.
  3. INRange

    INRange Formula 3
    Silver Subscribed

    Jan 27, 2014
    2,220
    Virginia
    Full Name:
    JD
    Didn't Volkswagen already solve this problem? o_O
     
    Qavion likes this.
  4. SoCal1

    SoCal1 F1 Veteran
    Silver Subscribed Owner

    Jun 14, 2011
    7,763
    SoCal LA/OC
    Full Name:
    Tim Dee


    Yeah I love those diesels. My diesel puller will smoke my 355 ina 1/4 mile drag race

     
    INRange likes this.
  5. fatbillybob

    fatbillybob F1 World Champ
    Owner Consultant

    Aug 10, 2002
    16,362
    socal
    LOL nothing like diesel car or truck
     
  6. Cauf61

    Cauf61 Formula Junior
    Silver Subscribed

    Jul 12, 2016
    556
    Belgium
    Full Name:
    Patrick
    What a great tips...............................not
     
  7. INTMD8

    INTMD8 F1 Veteran
    Silver Subscribed Owner

    Jun 10, 2007
    5,094
    Lake Villa IL
    Full Name:
    James Moran
    Could try raising engine temperature. I’ve done this by temporarily blocking the radiator (s)

    Or decrease overlap with cam timing, not so easy.

    Or as Tim said, new cats, factory spec
     
  8. fatbillybob

    fatbillybob F1 World Champ
    Owner Consultant

    Aug 10, 2002
    16,362
    socal
    Try just doing basic maintenance and have everything work properly. There is no magic here...even in the people republic of kalifornia
     
  9. Wade

    Wade Two Time F1 World Champ
    Rossa Subscribed Owner

    Mar 31, 2006
    24,127
    East Central, FL
    Full Name:
    Wade O.
    Are you needs the same as for when the car was new? Or are they expecting your car to "pollute" less?
     
  10. vvassallo

    vvassallo F1 Veteran

    Aug 4, 2006
    8,166
    Palos Verdes
    Full Name:
    Vince V
    I'd go with FBB on this one. Make sure your plugs are new, the car is really warmed up beforehand - as in drive the snot out of it for 30 minutes. Depending on year, the bar is pretty low so if things are even barely working, you should pass. New cats or borrow a set if you have to. Run a full gas tank treated with Chevron Techroline or other injector cleaner. You might need to have your injectors cleaned or replaced. If replaced, check OSide Tiger for replacements with 4-hole atomizers. Good luck, but you probably will not need it.
     
  11. ernie

    ernie Two Time F1 World Champ
    Owner Lifetime Rossa

    Nov 19, 2001
    21,761
    The Brickyard
    Full Name:
    The Bad Guy
    1) Make sure that the coolant temperature is consistently above 176ºF / 80ºC. The Motronic ECUs do not go into final fuel mapping until they are reading coolant temps 176ºF+. If they are under the temperature the ECUs will run in secondary fuel enrichment mapping and the engine will not run as efficiently, because it is adding extra fuel in an attempt to keep the cats lit and hot. If the temp does not get over 176ºF / 80ºC then you will want to put in a new thermostat.
    1a) make sure that your coolant temp sensors are in good condition. If not replace as needed.

    2) Make sure that the resistance on your MAFs is at least 383Ω ohms. If not adjust them accordingly.

    3) Make sure your catalytic converters are in good condition.

    4) Make sure all spark plugs are in good condition and properly gapped.

    It would even help to disconnect the battery, reconnect the battery, then let the Motronic ECUs relearn the initial warm up parameters. After the reset and relearn take the car to get tested. And MAKE SURE the engine it at the proper operating temperature before and during the test!

    Some have run the fuel tank until the fuel gage shows "empty" and then added 3 gallons / 11 liters of pure alcohol, ran the emissions test, then topped up with normal gasoline/petrol after the testing has completed. But that is a last ditch effort ;)
     
    Qavion likes this.
  12. m.stojanovic

    m.stojanovic Formula 3
    Silver Subscribed

    Dec 22, 2011
    1,488
    Malaysia - KL
    Full Name:
    Miroljub Stojanovic
    The fairly easy way to try would be connecting two 1 Kohm resistors in parallel to the coolant temp sensors (CTS). As this would cause difficult cold start, the resistors would have to be "switched on" once the engine has warmed-up. For example, at 80C, the CTS resistance is 322 Ohms. Adding a 1 Kohm resistor in parallel would bring the total resistance down to 243 Ohms which represents 90C coolant temperature and this would full the ECUs to make the mixture a bit leaner.

    PS: I have no associations with VW

    CTS Chart:
    Image Unavailable, Please Login
     
    jqpd99 and INRange like this.
  13. ernie

    ernie Two Time F1 World Champ
    Owner Lifetime Rossa

    Nov 19, 2001
    21,761
    The Brickyard
    Full Name:
    The Bad Guy
    Hahahahahahaaaaa!!!!
     

Share This Page