Had engine lite on , said cyl 1 misfire and rough idle and rough idle with brake on , had mechanic change plugs , they changed all plugs and pack for cylinder 1 I had later cylinder 1 and random misfire and still same rough idle and brake idle ,with same codes ,took to dealer they said possible loose rocker arm , possible bent intake valve <don't believe for mechanic already looked at rocker arm with cover off (not Loose) engine lite goes off intermittently and all well for 4 hrs. to 3 days and lite back on same codes and when lite goes off seems to be no rough idle. Help Help

 

Ok, help us help you. What are you driving?