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Vauxhall astra petrol c.2003 runs on 3 cylinders

Discussion in 'Car Repairs / Maintenance' started by Nige F, 29 Apr 2019.

  1. Nige F

    Nige F

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    As title - suddenly started running on 3 - lumpy as **** Where should I start looking ? Over 100k miles . Thanks guys.
     
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  3. pete50

    pete50

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    Coil pack, plugs. After that it gets complicated.
     
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  4. Mottie

    Mottie

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    Plugs out, see which one is wet, change it, if still no luck check plug lead for spark. That’s for starters and should sort 99% of problems like this unless it’s something bigger - loss of compression - burnt valves or maybe a faulty injector.
     
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  5. Burnerman

    Burnerman

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    Presumably the engine management light is on?
    A scanning tool will get you a bit closer - and you may need it to put the lamp out.
    John :)
     
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  6. Nige F

    Nige F

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    Yes the management light is on - I'll have a look @ the plugs and take it to a mechanic for scan.
     
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  8. lostinthelight

    lostinthelight

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  9. Nige F

    Nige F

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    Update - thought I'd check the plugs by removing the leads one @ a time to see which cyl. was misfiring. Pulled 1 up about 25mm , still in the protective tube - started car and it ran smooth - the spark jumped the gap and helped that plug fire - I'll take it out ans see condition later
     
  10. Burnerman

    Burnerman

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    Maybe just an HT lead fault after all Nige....I guess this car has the 'block' type coil pack and is either 1.4 or 1.6?
    You'll maybe see sparking or hear a 'click' as the electricity jumps to earth.
    John :)
     
  11. Nige F

    Nige F

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    Indeed, the engine light went out too ! It's just a stop gap car ( for my D.i.L ) until the MOT in August. No hope then because it smokes like a good un and has probably killed the cat . And I'm repairing her Ka too - new water pump and thermostat. I haven't touched a car for years - now this !:unsure:
     
  12. Nige F

    Nige F

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    You're right on both counts - block and clicking. 1.6.(y)
     
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