Mazda Repair Questions? Ask Mechanics for Answers ASAP
Need to check to see if pcm is driving coils. Shop needs to install a noid light on all 6 coils one at a time while engine is running, if one is not blinking your PCM, or computer is bad.
If all blink you have a base engine concern such as a valve or piston. In most cases you just have a bad computer (PCM or power train control module.)
Please let me know if I could help further