Cylinder 2 misfire P0302
I have an 05 6spd stick with 110K. I've had the car since 25K and it has always been very reliabl, aside from having to replace both front lock actuators and the airbag light sometimes staying lit.
Wednesday evening I started up the car and right away I could tell something was wrong with the idle. It had been sitting for about 3-4hrs since my last drive and I had no indication of a problem. I drove down my street but almost immediately the CEL came on and continued blinking so I turned around and parked it until Friday when I could get a scan tool to read the code.
When I started it up to read the code it had the same idle problem and the CEL continued to flash. I got a Misfire on Cylinder 2 P0302 reading. It also smelled like I had unbearnt gas in the exhaust.
From other discussions it seems like it is likely to be a bad coil but since they are so expensive I'd like to know the best way to determine if that really is the problem.
Also, would you change all the spark plugs at this point? Or is that just inviting one of the other coils to fail?
Lastly, since the Honda OE coils are so expensive but seem to last the longest, where would you suggest I look to get the best price on a genuine coil if that's what it turns out to be?