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What Are Symptoms Of Failing Leads/coil Pack?

fintious maximus
fintious maximus
in Ford Mondeo / Vignale Club

Featured Replies

Hi all, replaced plugs,leads and coil pack about 3 months ago as the car was juddering a bit. Bought bits on Ebay and last week the car has started to judder a bit when holding at around 2500rpm. I'm thinking rubbish leads or coil pack but wanted to see what you thought before I buy better ones.

Someone suggested it may be the dreaded swirl flaps on their way - are they similar symptoms?

Thanks in advance

  • Quote


    My focus coil pack failed recently symptoms were hesitation in acceleration and running rough also engine light came on. Was the coil pack you bought a ford original part as it is common for pattern parts not to solve the problem or fail quickly.

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    juddering, hesitation and misfires are usually common with leads, plugs and coils.

    i would be very vary about buying cheap parts, they can be of quite poor quality sometimes.

    What i found with my focus was it didnt like any coil pack, leads or plugs except genuine ford ones. dont know how many sets i went through, replaced with genuine bits and everything was fine there after. was much more expensive but worth it

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    • Author

    thanks for the replies and no they weren't genuine parts. Think the coil pack was £18 from ebay (Ford wanted about 160). I'll bite the bullet and get some better kit and see what happens!

  • Quote

    thanks for the replies and no they weren't genuine parts. Think the coil pack was £18 from ebay (Ford wanted about 160). I'll bite the bullet and get some better kit and see what happens!

    how about this genuine/boxed coil - http://www.ebay.co.u...=item1c261aba7a

    plugs will be about £10-12 for genuine ones and last time i bought a set of leads was £60!

    be aware that unburnt fuel going down the exhaust is not good news for the cat as it can cause it to overheat and break up

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    • Author

    Thanks for that Stef, looks like a V6one but will contact seller to confirm that it's just a stock photo.

    Don't understand about the unburned fuel bit? Is that what happens if the plugs/leads/coil aren't up to scratch?

  • Quote

    Thanks for that Stef, looks like a V6one but will contact seller to confirm that it's just a stock photo.

    Don't understand about the unburned fuel bit? Is that what happens if the plugs/leads/coil aren't up to scratch?

    oops sorry, i went more by description than the pic - didnt even realise it had 6 outputs duhhhh

    yeah if the car is misfiring or not burning the fuel properly it ends up burning in the cat

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