ryanoffthehook

My 90 rx-7 vert has been ideling a little rough lately and I can hear it missing once and a while when im driving. the check light has been flickering on and off especiallywhen i let my foot off the gas.you guys know what this could be. Also every once in a while blue smoke comes out of exhaust for a little bit at high rpms then goes away. Oil is always changed on my car. please help!!!