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Thread: Spark Plug leads! help

  1. 14th March 2007, 09:37 PM #1
    DiscoDiver Guest

    Spark Plug leads! help

    I own a 2003 4l V8 Disco purchased 12 months ago. I had an issue with one spark plug lead six months ago. I decided that I would replace the whole 8 leads. It also turned out that all my platium plugs were shot and had to replace all 8 of them as well. I thought it was strange as I only had 50,000km on the clock and I thought platium are good for 100,000km.

    Well the issue is now I have a rough idling v8. I just checked the leads tonight and found that number 3,5,7,8 leads are shorting. This is the new set i put in 6 months ago.

    Any ideas? Just replace the leads and see what happens?

    Also how in hell do you get to the dizzy on the 4l v8

    Any advice appreciated,

    Mark
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  2. 14th March 2007, 09:42 PM #2
    DEFENDERZOOK's Avatar
    DEFENDERZOOK
    DEFENDERZOOK is offline OldBushie
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    did you gap your new plugs....?



    to check your leads......use a multimeter.....you are looking for 8-10,000ohms per foot......
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  3. 14th March 2007, 09:49 PM #3
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    ladas
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    One thing is - there isn't a dizzy on a 4l - it's all electronic.

    The connections to the ignition module(s) / coils are just tucked behind the intake manifold.

    I honestly don't know if you can get the ht leads off with the modules/coils in place.

    You may have to remove the inlet manifold - but I am sure somebody will correct me there.
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  4. 14th March 2007, 09:53 PM #4
    DiscoDiver Guest
    I had a service centre put them in as I was at work at the time so I wouldnt know what gap size they used.
    I actually kept the old set of leads to keep as a spare for long trips etc etc. I was going to just swap over the new set for the old set i had but I have no idea of getting to the dizzy.
    Is there also a recommended lead set to buy? and where do you get them from?

    Mark
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  5. 14th March 2007, 09:57 PM #5
    DiscoDiver Guest
    Well that solves that idea! No dizzy!
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  6. 15th March 2007, 06:45 AM #6
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    p38arover
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    Yes, the coil pack is behind the inlet manifold.

    It's accessible on a "GEMS" engine but I'm told it's difficult on the later "Bosch" engine as used on the D2 and the later P38A.

    I use Magnecor leads. I bought hem from the agent, Thundercords in Granville, NSW.

    The lead layout is shown in the workshop manual under Fuel System - Repair (at least it is in the P38A manual so it's probably the same in the D2 manual).

    Ron
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  7. 15th March 2007, 06:56 AM #7
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    amtravic1
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    I agree with Ron, buy Magnecor leads (or Gasmaster) and never replace them again.

    Ian
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  8. 15th March 2007, 07:43 AM #8
    HSVRangie Guest
    as above.

    Michael.
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  9. 15th March 2007, 03:45 PM #9
    DiscoDiver Guest
    Thanks for the info on HT leads. Do you roughly know what these leads are worth a set?
    Regards Mark
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  10. 15th March 2007, 03:49 PM #10
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    amtravic1
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    Quote Originally Posted by DiscoDiver View Post
    Thanks for the info on HT leads. Do you roughly know what these leads are worth a set?
    Regards Mark
    I think I paid about $120.00 for a set of Gasmaster leads about 6 years ago. I has a set of Magnecor leads on my old Rangie for around 10 years and a set on a V8 cruiser for at least 5 years before that. None ever needed replacing.

    Ian
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