engine size is found on the engine, but all Mazda engines in the b and z family have the imprint of DOHC on the rocker-cover when they are dohc

if you find an imprint of b6-XX-XX then you have a 1.6 and if dohc is found on the rockercover then it is a 1.6 dohc.

if you see b8, then that is always a 1.8l SOHC engine

ignition problem

its a Mazda engine . ( DOHC 4cyl. 16 valve 2.0l ) For the probe 1993

ignition problem

where the engine number is located it will have FE for 2000 and F2 for 2200