Cide

iTrader: (1)

I've searched for this and couldnt find anything on it but.. my Z had a lil misfire today while it was idling but i had to be somewhere so i just took off didnt run the car hard or anything but then when i was on my way home it did it again at a red light then the check engine light came on... so i get home and get my reader and i have code P0302 Cylinder 2 misfire... i have an 03 5AT with 68K no oil issues changed the plugs to iridium ones about 30k ago... so my question is if anyone have had to replace coils?

mthreat

iTrader: (16)

I think the most common cause is a bad coil pack, which is about $100 and easy to replace.

There can be other causes but this is the most common. Search the forums for "misfire" or "P0302", "P0305" (cylinder #5), etc.

Dr. Venture

iTrader: (19)

Best way to test if it is a coil. Find cylinder # 2. Switch it up with another known #'d cylinder. Road test till the misfire happens again. Recheck the CEL. And if the car now misses at the new # placement then it's the coil. If it is still at # 2 then it is another problem.

Cide

iTrader: (1)

well i erased the code and drove it last night and it didnt happen again but if it does im gonna hook it up to a scan tool and check the firing lines.. but if i cant get my hands on a scan tool then im just gonne switch them around and see what happens.. thanks for the info guys.