I have a '98 Camry with ~180k miles.

Current engine codes show a misfire on cyls #2/5 as well as a random misfire.

As 2/5 share a coil pack, it more than likely boils down to this pack.

Is there an easy way to test this? Where is the coil pack for 2/5?

Thanks gang!

 

So, I changed the center coil pack and the issue seems to still be there. Disconnecting the center coil pack altogether makes the issue worse, so replacing the coil pack didn't fix the issue.

I have noticed that the misfire is exaggerated by load. While at idle or with very little load, the miss isn't as bad. The miss is worse when at idle with the headlights, a/c and blower fan on high.

This happened one day, out of the blue.

Thoughts?