coilpack and plugs
#1
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coilpack and plugs
hi where do i look to see if my wrx has a single or 4 ,its an n reg v-limited. also which brand of plugs are best to use as could do with changing them as well cheers j
#2
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Your car is a MY96 Version 2, so you have 4 individual 'coilpacks' (i.e. an individual coil with a short lead and an electrical connector at the end) The coil end fits directly over the end of each spark plug, and is secured in the head by a single bolt.
Use either NGK PFR6B or PFR7B plugs. The 6s are OEM heat range and are fine. The 7s are a colder running plug and can withstand higher cylinder temps/pressures, so are good for upped boost with supporting mods.
If you get all 4 coilpacks new, and have no engine mods, then gap to 0.8mm (OEM recommendation). However, if you do have mods (or a MBC fitted), and/or the coilpacks are old, then gap anywhere between 0.6 to 0.7mm (more resistant to the boost blowing the spark out).
Use either NGK PFR6B or PFR7B plugs. The 6s are OEM heat range and are fine. The 7s are a colder running plug and can withstand higher cylinder temps/pressures, so are good for upped boost with supporting mods.
If you get all 4 coilpacks new, and have no engine mods, then gap to 0.8mm (OEM recommendation). However, if you do have mods (or a MBC fitted), and/or the coilpacks are old, then gap anywhere between 0.6 to 0.7mm (more resistant to the boost blowing the spark out).
Last edited by joz8968; 18 November 2008 at 09:16 PM.
#4
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I think brand new OEM coilpacks (can't be bettered) are about £67 (inc VAT) from the likes of Zen (and others), so not cheap... But once fitted, will last a long time and will resist misfires, as well as giving a nice fat healthy spark. I've bought 2 from Zen so far, just gotta get the other 2 lol.
The plugs can be had brand new on eBay for typically well under £30 delivered.
The plugs can be had brand new on eBay for typically well under £30 delivered.
Last edited by joz8968; 18 November 2008 at 09:25 PM.
#6
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Re the coilpacks, no you don't have to, but does make sense to do all 4 at the same time, as it's hard to diagnose a knackered c/p (can have microscopic cracks on it causing the spark to arc). So fitting all 4 at the same time pretty much will rule out an area to look at if you're having running problems/misfires.
The only reason why I got only 2 at the time was that they were very bad; the others not so (but still need replacing regardless). Also I had spent a truckload of cash that day anyway, and the extra £130-odd for the other 2, psychologically got the better of me (and my credit card) LOL
Last edited by joz8968; 18 November 2008 at 10:04 PM.
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