misfire in mx5 1.8 2.5mk while travelling @60mph

[AdrianHealy]

I hope some one can help. My MX5 misfires while I am travelling between 50 and 60 miles and then kicks in again. It doesn't lose speed but loses power. Te engine light flashes and then comes on solid. The solid I am told is the cat which is now ruined due to the misfires
I have checked plugs and leads and all replaced. Has anyone got ideas as I don't want to replace cat until sorted.
Cheers.

[MX5Spares]

Probably coils as these do give trouble.We have some perfect used ones and we have used cat also.086 8226506.Robert

[AdrianHealy]

Thanks George. I will be intouch. I just need to find out which coil pack.

[MX5Spares]

George ?? I have been called a lot of things over the years but never George....Both coil packs are the same so its only a case of getting 1 only, fit it,if car is still the same ,refit your old one on the other pack. 086 8226506 ,ROBERT

[AdrianHealy]

Top Man Robert I will give you a call later this evening if that's ok. Sorry don't know why I put down George.
Regards,
Adrian.

[AdrianHealy]

A big thank you to Robert for supply of Cat Conv and Coil pack. Robert all worked perfect and for the first time in years I have no engine light.

[MX5Spares]

Great result.!!