CHEVROLET CORSICA FUEL INJECTOR CLEANER

I Have A 93 Corsica With 235,000 Miles On It. It's A 2.2 L 4cyl, Auto With A Problem In The Rain. Driving Through A Thunderstorm A Few...

Missfire On 3rd Cylinder, But Not Everytime Your Start The Car. It Has Happened Only 2 X. , Checked Plug And It Was Ok, Suspect Number 3...