Miss fire or fireing two at a time how to fix?

Yes a broken motor mount can cause any vehicle to miss fire.

From the timing belt to the transmission the fireing orders are 1234 One and three fired the same time 2 and 4 fire the same time. Pull all the plugs for the spark plug on them and lay them across the top of the motor with plugs in them you can see which ones fire at what time. The spark plugs need to be touching a grounded part of the engine to fire. This also will help you find out if you have bad wires.

I think you have burnt valve seat or head gasket either cylinder head has to be removed

replace the injector in no 2 cylinder

Got a check engine light? Get the codes read to find out if the misfires are on all cylinders or just 1. Could be ign coil, bad crank or cam sensor, or a valve issue

Have you checked the timing belt?

the fuel injector may be faulty in that cylinder

could be a wire crossed, or it's out of time. since you used motorcraft plugs, did you set them properly to the correct gap? replacing plugs without gapping them can cause the sluggishness, out of time can cause the mis-fires and rough running.

get ur gas pump checked

check the mass air flow sensor at the clean air intake!!