For the past 8 months it has had a misfire at 1500 rpm which worsens as the engine gets hot. A mechanic has replaced 6 of the 8 coils. the condition has improved but the miss is still there at 1500 rpm and worsens as it heats up. I have checked the injectors and thay seem ok. I also replaced the O2 sensor after a code appeared. The check engine light is currently not on but has appeared indicating a #7 cylindar misfire.
Another mechanic has told me that the left side catalytic converter needs replacing. I have spent over $1000.00 to fix this problem, but it still exists.
Please help!!
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