If you are going to run seafoam through the brake booster, make sure to do it correctly. a few youtube videos out there on how to. I just did a thread on my random misfire issues.
http://www.mazdas247.com/forum/show...random-misfire-cylinder-3-solved-after-a-year
http://www.mazdas247.com/forum/show...random-misfire-cylinder-3-solved-after-a-year
