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I'm told by someone doing other work on my car that I'm in need of these. Rough idle apparently.

Let's start at the beginning. What EXACTLY do coil packs do?

What might I expect by way of symptoms if they need replacing?

What brands are recommended? I note JJR, Splitfire, and OEM Nissan seem to be the range. What are tired and tested? What is the go?

Do I need to go to the dyno once they're fitted?

What else do I need to know?

Thanks.

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Coil packs make the spark that ignites the air fuel mix in your engines' cylinders.

If you suffer from missfires, miss at idle etc, usually people replace spark plugs first and regap to 0.8mm.

If the coilpacks are definitely stuffed or failing, (getting old now!) usually a new set is the answer.

Most people swear by splitfires, and they have come down in price too.

I run them and have had no problems since.

You don't need a dyno tune, they just bolt staight in.

Hope some of this is useful.

Cheers

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Great thanks. Re the plugs. Mine are new as of 8000km ago, but the coil packs are original (120***kms). What are the chances it's the plugs versus the coils? I'll ask the same question of the guy who reckons it's the coil packs.

Thanks Sean.

Edited by LotusGTR
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