[Mk2] [NA] MR2 MK2 Rain in plug #1

[markyj1969]

With all the rain lately my MR2 has been spluttering a bit, found that spark plug #1 has been letting in rain water and needs replacing, any ideas what I can do to stop the rain getting in.

[SonicSW20]

Is the HT lead sitting correctly? It should form a seal on the valve cover.

[markyj1969]

Yes everything seems to be as it should, not had any issues before

[abovetherim]

you could smear some vaseline on the ht lead where it goes into the rubber boot at the top and also around the boot where it meets the cam cover.