Please help!!
 

i have a 2010 Honda Insight. It has been running beautifully for 2 years (i bought it used). Recently the check emissions light came on. We ran a check engine test on it and it came back with misfires in 2 and 4. We changed all of the spark plugs - but it has 8 (weird). So, after changing all 8 spark plugs it dies again on the highway. My partner says it is probably a bad coil. however, we cannot tell which coil to change, because nowhere , on any forum, can anyone tell me the firing order for the spark plugs!! i have called Honda, i have googled, i have hunted on Youtube, i dont know where to turn. If it isnt the coil, i will have to look at taking it to the dealer ($$$). Can someone please tell me what the firing order is- and i welcome any suggestions on a fix for this that isnt going to break the bank!! Thank you!!