Hello. This is my first post after many searches. I have an 06 Eddie with a 4.6 V8. The check engine light flashed a few days ago. I don't have a code reader and I thought the miss was too bad to just be plugs. I also was a little gunshy after reading about some of the problems people have had changing plugs. I pulled all 8 of the coils hoping to have them checked. Autozone can't check them - no baseline ohms. So I put the old coils back on the engine and pulled each one with the engine running. There was a change in engine performance with each one. So I took it to Autozone to have the codes read - no codes showed up. The engine misfires intermittently at idle, but badly under a load. I did NOT change the plugs. Could the problem be as simple as changing the plugs?