Have an 04 crossfire coupe and changed the spark plugs with bosch iridium 9600 also changed oil....put everything back together and started engine / now it is spits and sputters and the engine light is on. Rev'ed up motor to about 2 then let it idle and the check engine light started flashing....i need to know what to do to get my car running smooth and to get the check engine light off.... Any help would be greatly appreciated !!! Have been dealing with this for 2 days and the temp outside is 102/103 so it is very frustrating. !!!! Thanks