Hi
I have a '92 MX3 and its developed a missfire. it somethimes has a rough idol but not always however teh missfire becomes most obvious at 2000 rpm, this happens in every gear but only generally if the car is driven at a constant 2000 rpm (40-50 mph in 5th). Has any one come across this, got an idea what is causing it? and possible ways of mending the problem.
Thanks for your help

Check to make sure the EGR valve is operating properly and not leaking.

Start with plugs and wires, cap rotor, etc. then move up to egr, mas sensors etc.