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Thread: Rear plugs ,

  1. #1
    ianturbo's Avatar

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    Rear plugs ,

    Now we all know they ain't a easy swap , but come on , ,i have had this car 3 years and it never missfires , looking at the rear plugs its a wonder it started,,

    Sent from my SM-G780F using Tapatalk

  2. #2
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    Christ.

    I've got a slight misfire - more prominent when the engines cold and at idle.

    Plugs and a *full* service are a priority for me now

    Sent from my SM-G981B using Tapatalk

  3. #3
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    I had the same problem, and it turn out to be the coil pack


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    Coil packs are really expensive about £160 each.
    And you probably well not be able to find a replacement.
    You can go second hand replacement but they are all about 20 years old already and if they are working now they they probably done have much life left in them.
    I am not sure if mitsi still sell original coil packs .
    I believe the coil pack is unique to the vr4 engine like a lot of other things.
    And the after market scene do not provide any solutions at present.
    We are getting a bit left behind on this issue.

    Bye for Now!

  5. #5
    Davezj's Avatar

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    Your plugs look completely buggered particularly if the are all supposed to be iridium tipped plugs.
    Definitely need new ones.

    You can get double iridium plugs now with a bit of iridium on both sides of the spark gap.
    Witch should make them last longer the the standard single centre electrode tip plug.

  6. #6
    Davezj's Avatar

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    Probably the best spark plug you can get for spark performance is the cheapest copper only none resistive plug. But these create a lot of noise which is picked up on the radio and potentially in the ECU and other electrical circuits in the car which is why they are not used any more.
    However standard copper resistive plug are still probably the best spark performing spark plug you can get but they don't last long.
    If you don't mind changing the plugs every about 5k miles then these are the plugs for you.
    All of the other plug designs will only increase the life span of to he plug. Don't believe the hype about giving better spark.
    If you need better spark due higher boost of a change in fuel, etc, fit a higher out coil pack. Different plug will not give you a bigger better spark comparing new for new plugs. Reducing the gap on the plug will give a more consistent spark in higher boost applications or different fuels.
    .
    Last edited by Davezj; 11-07-2021 at 11:02 AM.

  7. #7
    jahooli's Avatar

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    I searched for months and Viamoto was the best place I found, took him 4 weeks to get them, finally got rid of the missfire tho after trying everything else.
    The COP replacement was too trick for me so I had to shell out.
    Cheers
    Paul
    youtube "tha got beef wi me"
    i made that.

  8. #8
    Davezj's Avatar

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    I am going to release a COP conversion kit soon.
    it is a completely plug and play kit, no wiring, no metal work making brackets, no looking for screws, washer, spacers, or anything else for that matter.
    i can even supply the coil packs.

    watch the forum for updates on this and it will be sold for as cheap as possible to make it affordable for all, to keep these cars on the road.

  9. #9
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    That's good to hear Dave, parts (especially electrical) availability is going to become a problem in the not to distant future

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    Regards Coil packs I have just bought a set from a manufacturer in China..Yes I know everyone knocks Chinese goods...I buy from Alibaba/Aliexpress quite a lot and to be honest get more good quality bargains than crap.

    Anyway, when compared to OEM coil packs they are identical right down to the 'melted in' ID numbers so I am beginning to think they may have been the original OEM suppliers.

    Let's face it how many car manufacturers make their own electricals? Even the Gearboxes in our VR4s originate in China.

    Anyway The manufacturer obviously likes bigger orders but I managed to buy 4 as a trial purchase...I am going to fit them in next week or two and will report back if anyone is interested?

    Bought 4 (minimum order) thinking I'd fit three and if anyone wants to try the odd one as a freebie (Adaxo ?) in amongst their OEM other two any imbalance or performance issues would show up as irregular running.

    Worth a try I think at less than £20 EACH!



    Coils.jpg
    Last edited by andyp_fto; 21-07-2021 at 12:20 PM.

  11. #11
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    Definitely interested. This is an area where a lot of us are starting to have issues. Please let us know!

  12. #12
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    @andyp_fto
    20 quid!!
    they better not work ive just paid £150 a coil pack!!

    Only kidding, hope you have found a bargain, keep us updated.
    Paul

  13. #13
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    Quote Originally Posted by jahooli View Post
    I searched for months and Viamoto was the best place I found, took him 4 weeks to get them, finally got rid of the missfire tho after trying everything else.
    The COP replacement was too trick for me so I had to shell out.
    Cheers
    Paul
    I'm with you on this , if its not just a straight swap I'm lost on electrics

    Sent from my SM-G780F using Tapatalk

  14. #14
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    Quote Originally Posted by ianturbo View Post
    I'm with you on this , if its not just a straight swap I'm lost on electrics

    Sent from my SM-G780F using Tapatalk
    Just wait a bit for @Davezj to release his p&p cop kit, knowing his attention to detail it will be well worth watching for.
    His FL Legnum VR4 running 238.8 ATW HP and 500Nm @1.05 bar on LPG
    Hers PFL Legnum VR4 COTY see here for full story
    Looking for AMSoil? click here

    living in north west?
    would you like to meet with other VR4 fanatics?
    click here

    My recent and ex Mitsubishi's


  15. #15
    ianturbo's Avatar

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    Quote Originally Posted by adaxo View Post
    Just wait a bit for @Davezj to release his p&p cop kit, knowing his attention to detail it will be well worth watching for.
    Will do ,

    Sent from my SM-G780F using Tapatalk

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