Put in new plugs, new wires and new coil on daughters 2009 Impreza. Car worked fine for two days and then stated stalling. Readjusted connection to coil and that seemed to fix the problem,. But no! now it bucks, dies, etc. Ran scan for the problem and it says all four are misfiring. Where do I go from here. Also, new transmission went in less than a year ago. Replaced air filter when I did plugs and coils.Trust no shops and Subaru will kill me with price. What should I look for now?
Help!