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  1. #1
    Reverse Gear

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    A3 (2001) 1.6 running on 3, blowing smoke .. fouling plugs?

    Hi just after some advice on my A3 Audi with the 1.6 AVU engine. When I first brought it I had a bit of a fan/overheating problem, I found the cause of overheating to be the electronic thermostat (thanks to this forum), so replaced this with a new one and whilst at it replaced the temp sensor.. This fixed the overheating problem. Took it for a drive, quickly realized it was running on 3 cylinders, put a new set of plugs in it and seemed to run well even though it blew quite a bit of smoke (black / grey) and spat out a big amount of what looks like black spray paint out of the exhaust.. And then started running on 3 cylinders again. Pulled the plugs out and they all looked very black. Plugged the VAG cable in and pulled the faults, which gave me misfires on 2 different cylinders, O2 sensor malfunction, and one to do with the EGR valve.. Actual codes listed below. The car puffs out a bit of smoke on first start, but runs on 3 and looks like its running very rich, puts out a lot of black smoke when revved.. My main question is, does anyone know what I should look at next? Should replacing the EGR and O2 sensor make much difference? Can I simply remove the EGR setup buy buying the blanks from eBay ? If worse comes to worse, can I replace a AVU engine with a AKL 1.6? Thanks for reading my first post, any help would be much appreciated..

    Fault codes are as follows;

    - 16685
    - 16514
    - 17811
    - 16514
    - 16514
    - 16686

    Also, here is a video of the 'black paint' type stuff that blows from exhaust

    A3 exhaust test - YouTube

    And another video of smoke blowing on first start up

    A3 test #1 - YouTube




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  3. #2
    Spatula's Avatar
    !.8T AGU

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    Have you tried switching coil packs over? i.e. 1 with 2 and 3 with 4. Unplug battery for 20mins and reconnect. Run car and take another VAG reading. See if misfires have changed cylinders. If so, replace coil packs.

  4. #3
    Vex182's Avatar
    Guess what I drive...

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    I think your engine uses ht leads? Have you checked them for damage?
    Silver 2002 Audi S3 225 (BAM) since March 2011.

    Mods: Badger5 2.2 TIP, Jetex filter, PCV delete, 710 DV, Standard N249 in use, R-Tech Stage 1 TiV Remap, Audi TT Pedals, Red Dogbone, Polybushed tie arms. All silicone boost pipes, Michelin PS3s, Red V6 coil packs, MK4 flat blade conversion, retrofited cruise control.
    Currently: 254bhp - 276lb/ft (174bhp/ton) as of 11/02/2013 On V-Power

 

 

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