Suzuki SWIFT HATCHBACK 1.4 GA, manual, year 2013, 67 miles, 108 thousand km. It jerks when starting cold and only in 1st gear. When it reaches normal temperature it no longer jerks. I checked the spark plug coils and they are fine. I changed the spark plugs. I changed the air filter. And it keeps jerking in 1st gear when cold. Has anyone had this same problem and solved it? How did you solve it?