Hello, has anyone run into this situation. I originally had a check engine code of missfire cylinder 3 which was unoticable driving. I changed all the spark plugs with autolite brand. Now it is bucking very baddly all over the place and not even driveable. Since then i have checked all plugs and coils for damage and even replaced a coil on cylinder 1. now error codes are saying missfire on 1 and 3 and random missfire. I had it put on a scanner and all injectors are working properly. Any ideas? Thanks Matt

 

Check your firing order.

 

re place your plugs... Again.