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My 2004 vy ecotec auto is struggling under power and I'm not sure why any ideas?

Discussion in 'VY Holden Commodore (2002 - 2004)' started by Jordanb, Feb 4, 2019.

  1. Jordanb

    Jordanb New Member

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    It struggles if i try to take off hard or accelerate hard from low speeds only seems to happen when i try to accelerate hard I recently upgraded these things trying to fix the problem including - spark plugs, coil packs, ignition leads and I also change the oil + filter and air filter pretty regularly I'm no mechanic but do all my own work on the car as I can't afford to take it to a shop so any help would be muchly appreciated thanks, Jordanb
     
  2. greenacc

    greenacc Searching for the billion

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    Checked for error codes?
     
  3. Jordanb

    Jordanb New Member

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    I don't have a reader but will an error code show up in the not sure the name of the mode some call it police mode or whatever you can cycle through the comp and it will come up with codes but all 0's
     
  4. krusing

    krusing Well-Known Member

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    Is the Engine Check Lamp on, on the Dash ?
    Also What Suburb you live in,
    As there are some members that may help you out, if you indicate your Suburb.
     
  5. Jordanb

    Jordanb New Member

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    Nah mate no lights on dash or anything that would indicate a problem and I'm in weribbee​
     
  6. krusing

    krusing Well-Known Member

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  7. Drewie

    Drewie Active Member

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    When did you last change the fuel filter? Might be partially blocked.
     
  8. tml678

    tml678 Well-Known Member

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    I'd give the throttle body a good clean too, the fact that it only plays up under hard acceleration might suggest that the butterfly is sticking a little when you give it a bootful.
     
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  9. Jordanb

    Jordanb New Member

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    I'll look into that thnx mate
     
  10. Jordanb

    Jordanb New Member

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    Thankyou could you recommend a cleaning method?
     
  11. tml678

    tml678 Well-Known Member

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    If you duck into SCA, you can buy throttle body cleaner. It comes in an aerosol can normally and is very easy to use if you follow the instructions. Read up on how to clean inside the plenum chamber as well. The ECOTEC's can get pretty grimy under there and it's well worth looking at to help with smooth running as well.

    I'd be looking at this for the throttle body:

    https://www.supercheapauto.com.au/p...ml#q=throttle+body+cleaner&lang=en_AU&start=1
     
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  12. Jordanb

    Jordanb New Member

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    Legend thanks mate.
     
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  13. _R_J_K_

    _R_J_K_ Well-Known Member

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    When was the last time you changed the transmission fluid?
     
  14. gohrdrgomad

    gohrdrgomad Active Member

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    Have you ever unpluged the maff or tps etc without disconecting the - battery first. If so disconect for 10- 30 min allowing the comp to recomunicate/reset/recalibrate. Then see if any improvement after 100 km or so.
     
  15. Lex

    Lex Well-Known Member

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    You mentioned you changed coils. Did you change dfi as well?
    Have you checked wiring around cas & dfi plugs?
     
  16. Jordanb

    Jordanb New Member

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    Like I said I'm no mechanic and am not sure what the dfi plugs are at a guess I would say direct fuel injector plugs and as of checking the wiring no I havnt over the next two weeks I'll give each of these a try I'll start with a throttle body clean then fuel filter ect I'll keep use posted on what hapns thank all very much for your help let's see how it goes haha
     
  17. tml678

    tml678 Well-Known Member

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    Please do keep us updated :)
     
  18. Jordanb

    Jordanb New Member

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    Would the maff sensor be one of these two I would asume to messier air flow if so which one do I unplug and leave for abit I'll try that as have time to kill
     
  19. Jordanb

    Jordanb New Member

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    I tried uploading a pic but it said it was two large I'm talking about the two what I asume to be sensors on the throttle body think that's what its called the bit between airbox hose and engine there are 2 sensors one on the side and one on the top just wondering what is which
     
  20. gohrdrgomad

    gohrdrgomad Active Member

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    Just the battery
     

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