Several Misfire 4.8i

[Hjaltivignis]

Originally Posted by Baby Unicorn Taco

Definitely check for oil in the spark plug wells as stated earlier. Also, you replaced one spark plug but if they all haven’t been replaced recently that could be your issue as well. You might have plugs that are in bad shape and don’t like the low rpms causing the multiple misfires that disappear at higher rpms. I had this issue on my 4.8i and 8 new plugs solved the issue.


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Less than a year since they were all changed, did check for oil on cyl 5-8 and no oil visible and spark plugs looked perfect.