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#1
18th February 2011, 07:12 PM
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Spark Plug Lead,s question
I,m just putting the finishing touches to my car & thought about this.......
Do the Plug leads need to have the word "Surpressed" ( or words to that effect) written on them to pass the IVA ? cheers andy 
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#2
18th February 2011, 07:34 PM
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Is this something to do with anti radio interference? If so I think all modern ht leads are suppressed nowadays. I could be wrong though
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A few build photos... www.photobucket.com/ntsengineering
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#3
18th February 2011, 07:41 PM
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There is mention in the IVA manual Andy but cant remember what/where it says but is definately to do with suppressing interference with other equipment.
Most O.E. leads have some marking on.
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Cost : Little as possible. Thanks : To those who by their generosity my build has progressed. Its a handmade sports car not a flaming kit car !!! If at first you dont succeed,avoid skydiving... No parachute require to freefall,only if you want to do it twice.
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#4
18th February 2011, 09:10 PM
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Cheers Nathan, Paul...
I checked my current plug leads today, even tho they are of the "Motorcraft" brand, they don,t have any markings on them to show they are of the surpressed type, So should I look for some that have the markings or just accept that all modern leads are manufactured to this requirement? & would Mr IVA man be happy if they don,t show any markings? thanks Andy
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#5
18th February 2011, 09:24 PM
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Andy - I'm in exactly the same boat - think I got the same leads as you!
The manual says - 1. The HT ignition system must be fitted with radio interference suppression equipment. 2. The trade name or mark and trade description must be present on the interference suppression equipment 3. There must be a maximum of 120mm separation between trade markings on suppression cables. I've assumed that they will need leads with markings on them so I plan to get some new ones before IVA. Seems better than taking the risk I have read about a couple of cars failing on this
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#6
19th February 2011, 09:32 AM
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Cheers David,
I think item 2 in your post confirms that the leads must be marked showing they comply with the interference suppression requirement .....I,ll go and get a new set, like you say, wouldn,t want such a small thing to cause a problem at the test  Tho, I,ve seen some leads on ebay costing around £60  ....I,ll be looking for some cheaper ones  cheers andy
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