boy&hisdogs
I'm Awesome
Good news! It's fixed!
I pulled spark plugs #6 (misfire cylinder) and #4 (known good, zero misses) and looked at them side by side. #4 was a nice looking toasty marshmallow, and #6 was dark and wet. The exhaust had a strong fuel smell so no surprise on the wetness of the bad plug. In this picture, you can see #4 on the left and #6 on the right.
I moved plug #6 to cylinder #4 and the misfire followed it. I then replaced it with a new plug and let the truck run for about 15 minutes with no misses. Throughout the week I saw a few misses coming from #5 here and there, not enough to trigger a code or notice without the scanner but since I have extra plugs I'll replace that one too if it persists.
I feel like I just won the lottery! I'm so happy that it was just a bad plug, a $5 part that takes 5 minutes to replace. These plugs are only about a year and a half old and shouldn't be acting up this soon but oh well, way she goes sometimes. If anyone is wondering, these are the AC Delco Iridium plugs, normally I only buy NGK but I heard a rumor that these were made by NGK so I figured I'd chance it. We'll see how the rest hold up.
I pulled spark plugs #6 (misfire cylinder) and #4 (known good, zero misses) and looked at them side by side. #4 was a nice looking toasty marshmallow, and #6 was dark and wet. The exhaust had a strong fuel smell so no surprise on the wetness of the bad plug. In this picture, you can see #4 on the left and #6 on the right.
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I moved plug #6 to cylinder #4 and the misfire followed it. I then replaced it with a new plug and let the truck run for about 15 minutes with no misses. Throughout the week I saw a few misses coming from #5 here and there, not enough to trigger a code or notice without the scanner but since I have extra plugs I'll replace that one too if it persists.
I feel like I just won the lottery! I'm so happy that it was just a bad plug, a $5 part that takes 5 minutes to replace. These plugs are only about a year and a half old and shouldn't be acting up this soon but oh well, way she goes sometimes. If anyone is wondering, these are the AC Delco Iridium plugs, normally I only buy NGK but I heard a rumor that these were made by NGK so I figured I'd chance it. We'll see how the rest hold up.