ABF ECU codes

Discussion in '16-valve' started by Matas, Oct 26, 2020.

  1. rubjonny

    rubjonny Administrator Staff Member Admin

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    can see it was saying 7 degrees on the cold start, was it really that cold where you are? if not then looks liek the sensor is bad :)
     
  2. Matas Forum Member

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    it is 7 degrees outside now yes
     
  3. Matas Forum Member

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    if it is not coolant temp, maybe intake air temp sensor can be faulty?
     
  4. rubjonny

    rubjonny Administrator Staff Member Admin

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  5. Matas Forum Member

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    Ok thank you, its the same for 16v?
     
  6. rubjonny

    rubjonny Administrator Staff Member Admin

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    yep the ecu coolant and inlet temp sensors have the same curve
     
  7. Matas Forum Member

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    I opened auto data and went playing with a multimeter for a bit.
    FIRST 2 PICS: checking primary resistance should be 0.5 to 0.7 ohmes, I barely got 0.1
    PICS 3 AND 4: checking air temperature resistence. Temperature outside is about 10 degrees now and I got 8600ohmes, and in autodata it says it should be max 7000 ohmes when 0 degrees.
    PIC 5: how do I remove coolant temp sensor?

    Also, I was checking injectors plug, in autodata it says it should be 15-20ohmes, I get from 15-20 in all plugs, but only for a second and then resistance is gone, I mean its not consistent.
    123842045_864498717663616_6677375727213905894_n.jpg 123652965_813836029450998_3734120748159712503_n.jpg 123718818_1055308804986341_2320782473581045873_n.jpg 123668565_1290800884651738_6782515751770201568_n.jpg 123685945_3424574784295054_2649411931058162924_n.jpg
     
  8. Matas Forum Member

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    18 degrees water, 2500 ohmes
    Tested in 85 degrees water 230 ohmes, havent tested in cold water yet
    EDIT: tested in 5 degrees water, got up to 5300 and was slowly goin up still
    IMG_20201105_183738.jpg
     
    Last edited: Nov 5, 2020
  9. Matas Forum Member

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    So I think coolant temp sensor is okay, just curious about iat sensor and coil resistance
     
  10. rubjonny

    rubjonny Administrator Staff Member Admin

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    you test air temp same way as coolant sensor, on the pins of the actual sensor in the airbox not the 2 pin plug which comes off the ecu loom ;)

    coil looks suspect but then again if the car actually runs fine when started it cant be all that bad, usually they either stop working altogether or break down hot. if the coil casing has cracks in it moisture can seep in making cold starts poor
     
  11. Matas Forum Member

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    ok ill go check these out now, my car also starts to missfire when cold, stutters, sometimes it missfires so much that if I release or give more gas it will shut down, I have to keep accelerator in same place for it now to shut down, but works its way out
     
  12. Matas Forum Member

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    10 degrees outside IMG_20201107_141824.jpg
     
  13. rubjonny

    rubjonny Administrator Staff Member Admin

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    Coil may be a suspect then, spark plugs, leads, cap and arm also worth a look if they're old or poor quality. Try to use Bosch or beru make if you can.

    While it's misfiring check the engine rpm measuring block also see if it's showing erratic at the same time though it can be hard to tell if it's misfiring because signal is erratic or if the rpm is erratic due to the misfire :lol:

    Definitely get the wiring off the engine and repaired though
     
  14. Matas Forum Member

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    Spark plugs have been changed, leads, cap and arm too, all that is left is visual inspwction on coil cover and wiring then
     
  15. Matas Forum Member

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    Little bit of gap on the edge and a bit of wet on 2nd coil cap
    View attachment 19093
    A little gap on the edge and 2nd coil cap is a bit wet, any chance of taking it out withouth removing intake manifold? IMG_20201107_142654.jpg IMG_20201107_142709.jpg
     
  16. rubjonny

    rubjonny Administrator Staff Member Admin

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    if thats fuel leaking out then need to pop it out yep, upper inlet has to be split off before i can be removed
     

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