[JDang444]

UPDATE:_x000D_
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The car finally threw a code. P0304._x000D_
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Now that I know it’s cylinder #4 and knowing the following information:_x000D_
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-spark plugs have less than 5000 miles on them_x000D_
-short term fuel trim holds at -11 or more during idle. This is consistent and ho

[JDang444]

BTW, I do plan to swap the coils and see if the code goes to the other cylinder. But the misfire happens so randomly and sometime it doesn’t happen for weeks. Can I do a resistance check on the coils too and compare it to the others?

[JDang444]

Quoted From college man: _x000D_
_x000D_
pull the cop for each_x000D_
cylinder and inspect the bottom for burning. where the old plugs_x000D_
discolored? did you use NGK plugs?

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I’m using cheap NGK V-Power plugs to check just to see if it was the old plug

[JDang444]

Thanks for the responses everyone._x000D_
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I’ve done all the recalls for sensors and fuel pump assembly on the car. I’m aware of the many design flaws such as the butterfly screws (did the loc-tite) and disintegrating pre-cats in the header (catless header ins

[Author]

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