Misfire after spark plugs

[FoFoJoe]

I would also swap the coils. I had basically the same issue and symptoms you described 2 summers ago. Although my issue started on it's own, I hadn't swapped the plugs before.

Here is the kit I used. NGK plugs and Beru coils. No issues since.

https://www.ecstuning.com/b-assembled-by-ecs-parts/ignition-service-kit/99760210700ikt2/

60k miles and 20 years of service isn't bad for factory coils.

Also when you swapped the spark plug tubes what tool did you use?

I used a transom boat plug, 1" lol. Wrapped it in electrical tape and plucked all the oil tubes out perfectly.

[Escott1622]

Originally Posted by FoFoJoe

I would also swap the coils. I had basically the same issue and symptoms you described 2 summers ago. Although my issue started on it's own, I hadn't swapped the plugs before.

Here is the kit I used. NGK plugs and Beru coils. No issues since.

https://www.ecstuning.com/b-assembled-by-ecs-parts/ignition-service-kit/99760210700ikt2/

60k miles and 20 years of service isn't bad for factory coils.

Also when you swapped the spark plug tubes what tool did you use?

I used a transom boat plug, 1" lol. Wrapped it in electrical tape and plucked all the oil tubes out perfectly.

Boat plug here too, haven’t removed them yet but I bought it off Amazon

[Escott1622]

Pulled coils, end of one where the rubber meets the spark plug was ripped and wearing away. Looks like some new coils are in the plan

[Frodo]

So, did you manage to get rid of the misfire?
Just curious.

If so, did you try the new coil pack(s) with the previously installed NGKs? Or did you change two variables: coils AND plugs?

[Escott1622]

Originally Posted by Frodo

So, did you manage to get rid of the misfire?
Just curious.

If so, did you try the new coil pack(s) with the previously installed NGKs? Or did you change two variables: coils AND plugs?

If I remember correctly I put the correct plugs in and also replaced the one coil that the rubber was bad on. Been running like a Champ until I dukes of hazard over a curb at 60 a few weeks ago.

[Frodo]

You say you put in the “correct plugs” along with replacing the one coil. But I’m not convinced you had incorrect plugs in there before. The giant pic, haha, you included in your earlier post shows the exact same plugs I put in my car (also an ’01) in July. This car seems to like them just fine and, nearly 500 miles later, she’s still “running like a Champ” as you say, throwing zero codes. Stl-986 (different thread) all but guarantees she eventually will—I’ll believe it when I see it. If they’re the “wrong plugs” why would it take thousands of miles for that to manifest? Especially when plug issues are only one of several things that can cause misfires. I tend to agree with ike84: why would a reputable parts manufacturer (like NGK) risk their reputation by saying their part will work in a certain application (ie in a specific make/model) if it won’t? That just doesn’t make sense to me either.

I kind of hoped you’d replaced the coil and tried the new one with the NGKs still in there to see what would happen. But…if it’s runnin’ well now I guess that’s what matters.

Sorry to hear about your Dukes of Hazard moment…sh*&%t happens. I know. Ask me how..