Dusterbd13
Dusterbd13 MegaDork
2/6/25 7:05 a.m.

99 miata, fm2 kit based turbo setup.  15 psi, stock coils and wires. Aem fic6 engine management. 

Went to move the parts car yesterday and it was running like absolute E36 M3, misfire all over the place. Plugs are fouled, and im guessing from me not letting it warm up due to no cooling system. 

If im buying plugs, may as well buy the right ones.

codrus (Forum Supporter)
codrus (Forum Supporter) UltimaDork
2/6/25 11:43 a.m.

The ones that Flyin' Miata sells. :)  NGK, I think they're the "7" heat range?

 

Keith Tanner
Keith Tanner MegaDork
2/6/25 11:47 a.m.

We used to use 7 heat range but they were a little too prone to fouling. We moved to 6 quite a while ago. If you want to source them from somewhere else, they're NGK ZFR6F-11.

https://flyinmiata.com/products/ngk-extended-reach-spark-plugs

Dusterbd13
Dusterbd13 MegaDork
2/6/25 12:07 p.m.

Thanks y'all! It had some sort of Denso iridium plug in it and I assumed that couldn't be right. And Keith I need to make an order from you guys sometime soon. I think I need to wait until you're silicone intake tubes and blower radiator hoses come back in stock though

Dusterbd13
Dusterbd13 MegaDork
2/8/25 4:12 p.m.

The new plugs made a world of difference. Thanks. 

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