Posts Tagged: Hyundai runs rough

Hyundai runs rough, misfire codes

Diagnose and fix a Hyundai runs rough condition Late model Hyundai vehicles may suffer from a Hyundai runs rough condition where you also see a check engine light and pull misfire codes P0300 through P0304. Shops report that worn spark plugs and faulty coil on plug ignition coils are usually the cause. Test a Hyundai COP ignition coil If you get specific cylinder misfire codes, one way to check for a bad coil is to swap that coil into a cylinder that’s not reporting a misfire code. Clear the trouble … Read More