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Ok. r33 series 1 with high flow running 18psi.

Ive had misfire before and after replacing plugs 6 months ago and it completely fixed it.

I've replaced them again with BKR6E (same type - 0.8 gap) after having misfiring again. Same problem. So I swapped 4 of the 6 coil packs with other ones I had lying around. Drove the car around and it was perfect. Left those coil packs in and been driving around again. After a 30minute drive it's misfiring again.

Now:

Could still be coil packs

Ignitor module

Coil pack leads.

I'm thinking because it doesn't really happen when its cold its probably not the leads.

I will check the resistance on the coil packs. What about the ignitor module. Does that often play up? ANd if so are the 2nd hand ones likely to have issues also. I know people araldite up the coil packs, is there anything you can do to the ignitor module like that.

Thanks guys - I know the misfiring is a bit old by now.

Its mainly up over about 4000rpm when boost is hitting around 15-18psi..

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https://www.sau.com.au/forums/topic/264616-misfire-r33-at-18psi/
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