I don't think you need a specialist - any competent garage should be
able to sort out a 1.6 Mazda engine. The sort of things which need
checking are:

Compression - to check that the valves are seating correctly and the
rings are sealing the bores.

Ignition - are the plugs in good condition, and is the spark good?

Air - is the air filter choked?

Fuel mixture - are there any vacuum leaks?

None of this is rocket science. But you do need a garage you can
trust.

--- In mazdamx3ownersuk@..., "badmangabriel"
<angel_gabriel_2002@y...> wrote:
>
> I would like to take my (P+J) to a specialist, to be looked over
properly, you know, BUPA style
> care, instead of NHS style care. Can anybody recommend anyone for
me?
>