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  1. #1
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    tdi injector duty problem

    iv got a bad/smokey cold start problem with my car,vag com brings up a misfire on cylinder 1 and when i checked injector duty i have

    cyl1 cyl2 cyl3 cyl4 measured in mg/str
    2.99 -3.01 -0.19 0.14 as it the car got warmer they went to

    2.82 1.6 -0.73 -0.45 and then when i had been driving for about half an hour it was at

    CYL 1 CYL 2 CYL 3 CYL 4
    1.71 -0.74 0.72 0.42

    anyone have any idea what could cause this,
    iv already tried changing injector 1,

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  3. #2
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    run some injector cleaner through fuel system
    ive had a few do this and its due to carbon build up on the end/nozzle of injector
    if its a 2.0 tdi then it may need injectors
    prefix d and m are the ones at fault

  4. #3
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    injector loom problem mate im going to change mine it happens because the injector loom wiring overheats and melts because the wiring is runnin so close to the cars head where the boiling hot engine oil is which causes the injector to nozzle and injector to work sluggish showing the cylinder as if its going down but its usually just the loom but if your unlucky then you may need to do the head/full injector

  5. #4
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    ok i changed the injector loom and that didnt fix it,i also did a compression test and that came up ok,

    what else could it be that causes the injectors to do this real bad when cold but then goes within tollerance when engine is properly warmed up

  6. #5
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    iv just checked and when its totally cold from first start cyl 3 is like it too and cyl 4 compensating
    cyl 1 cyl 2 cyl 3 cyl 4
    2.99 -3.01 2.79 -2.78

  7. #6
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    Run injector cleaner, check all connections are clean and getting a good contact on the injectors. Other then that the solinods on the injectors are probably starting to die which means new injector/injectors.
    06 Audi 2.0 PD140 Sport TDI Quattro S-LINE.
    Old engine 330 bhp @ flywheel 263 bhp @ wheel 490 lb torque. Audidriver write up HERE
    Now stripped and playing with an uprated Cryo treated engine fitted with bigger turbo,water/methanol,uprated injectors etc etc.Wanting 400 bhp and 500 lb torque.

    Other car 500+ bhp MK4 Golf R32 turbo.

  8. #7
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    Read through this before you do owt else!

    A3 TDI PD injector loom issues - Audi Mag | VAGOC.co.uk

 

 

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