testing the coil packs
 

Hello everyone I just bought a 2008ms3 and I would have to say I love it. But this is my first boosted car and I have tarted to how it some tlc for sustainability. After changing my plugs I still noticed a "misfire" feeling do I believe one of my coil packs is bad. So I purchased a voltmeter to see what's going on but.. I don't know what is the reading I should look for on these particular packs and what setting to use in my meter . If anyone can shed some light would be greatly appreciated .

Welcome. What did you gap your plugs to? Std should be 28. Searching would help. I was new once too. Donate if this was helpful. You'll find lots of helpful posts.

try this thread for CP testing
http://www.mazdaspeedforums.org/foru...stance-117062/

Try this one to stretch coil springs. Outer coils.
http://www.mazdaspeedforums.org/foru...etch-mod-4577/