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  1. #1
    Active Member Two Rings jrow26's Avatar
    Join Date
    Apr 01 2016
    AZ Member #
    371134
    My Garage
    2008 Nissan Altima
    Location
    Fort Polk/LA

    B7 s4 loss of power and misfires

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    My 2006 s4 has started to misfire when trying to accelerate.. and almost falls on itself when trying push the pedal down .. if I accelerate slow I have no problems. Usually worse when car is warmed up.. I would only get the check eng light every now and then but now it stays on constant. Had autozone check for faults ( I'm in the middle of nowhere and waiting on my vagcom cable) and they say my fault codes are this:

    P0171.. system to lean bank 1
    P0171.. system to lean bank 1
    P0300..random misfire detected
    P0308..cylinder 8 misfire detected
    P0306..cylinder 6 misfire detected
    P0305..cylinder 5 misfire detected

    They are telling me to replace my mass airflow sensor..I feel like that's just throwing parts at the car.. I've spent a few hours reading up but no real answers.. some say plugs and coil packs .. others say timing chain..but there symptoms and fault codes don't really match mine.. any help would be greatly appreciated!


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  2. #2
    Active Member Two Rings jrow26's Avatar
    Join Date
    Apr 01 2016
    AZ Member #
    371134
    My Garage
    2008 Nissan Altima
    Location
    Fort Polk/LA

    . Here is the plug I pulled out.... I mean I've seen worse but first time I've worked on German made cars


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  3. #3
    Active Member Two Rings jrow26's Avatar
    Join Date
    Apr 01 2016
    AZ Member #
    371134
    My Garage
    2008 Nissan Altima
    Location
    Fort Polk/LA

    Well went to the right side of the eng. (Looking from the front of car) and all but the 3rd plug from the front look like this . Any thoughts


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  4. #4
    Active Member Two Rings jrow26's Avatar
    Join Date
    Apr 01 2016
    AZ Member #
    371134
    My Garage
    2008 Nissan Altima
    Location
    Fort Polk/LA

    Well replaced all the spark plugs with Ngk bkr6equp 3199.. and moved the coil packs around ..misfire codes are gone but still drives like crap when you try to accelerate. Rescanned and now I'm only getting p0171


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  5. #5
    Active Member Two Rings jrow26's Avatar
    Join Date
    Apr 01 2016
    AZ Member #
    371134
    My Garage
    2008 Nissan Altima
    Location
    Fort Polk/LA




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  6. #6
    Established Member Two Rings bigwilly1267's Avatar
    Join Date
    Jun 10 2015
    AZ Member #
    336929
    Location
    Virgina

    May be a clogged injector.


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  7. #7
    Active Member Two Rings jrow26's Avatar
    Join Date
    Apr 01 2016
    AZ Member #
    371134
    My Garage
    2008 Nissan Altima
    Location
    Fort Polk/LA

    Thank you I'll check that next


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  8. #8
    Active Member Two Rings jrow26's Avatar
    Join Date
    Apr 01 2016
    AZ Member #
    371134
    My Garage
    2008 Nissan Altima
    Location
    Fort Polk/LA

    Ok so I pulled the intake off to see if I'm having a carbon build up problem.. since I don't know when the last time it was done by the previous owner.. and to me it doesn't look bad like other I've seen on here...


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  9. #9
    Active Member Two Rings jrow26's Avatar
    Join Date
    Apr 01 2016
    AZ Member #
    371134
    My Garage
    2008 Nissan Altima
    Location
    Fort Polk/LA

    Oh and does anyone know the name of this part. Broke while pulling the hose off


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  10. #10
    Active Member One Ring
    Join Date
    Apr 01 2010
    AZ Member #
    56989
    Location
    Durham, NC

    Did you ever figure out what the problem was?

  11. #11
    Active Member One Ring Jesse Sheridan's Avatar
    Join Date
    Oct 17 2016
    AZ Member #
    383333
    Location
    70454

    I have the same exact problem but with the other side of the motor.. did you ever find out what the problem was?

    Sent from my SAMSUNG-SM-G890A using Audizine mobile app

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