Just realize you are missing the secondary coil test.
Back to your question about the spark plug. I got my info from Hyundai's TSB. BKR5ES-11 is equivalent to BKR6ES-11, except it is a hotter plug. It your driving is more highway than city or stop-and-go, you have the better plug. But if you do more city and stop-and-go, you may want to consider going with the 6, colder plug.
I am not a fan of platinum plugs unless it is specifically required the OEM specs. I am not saying that they aren't good, I just have always follow what the OEM specs. Do this, while you are checking the coils, pull #1 and #4 plugs, and compare them. (It would be useful if you can snap a picture and post them.) Check if they are burning off differently. And then swap them. Put #4 plug into #1 cylinder and vice versa. I would be surprise if your next check engine light will show #1 misfire. If it is, then you know that particular plug is defective.
Thursday, February 5th, 2009 AT 11:52 PM