so today i went to get inspection sticker, there was a guy with a mustang he failed because of misfire, anyways this is my question is what exactly does misfire mean? ****** up piston,need new sparkplug, wires,etc?
less likely causes can be not enough fuel (blocked fuel injector), valves not shutting fully (dodgy valve spring), not enough air (air filter)....i could keep going...but spark issues would definately be the first thing i look for in a misfire