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Q: what causes an ignition coil housing to go bad & how do you check it? on 1999 Pontiac Grand Am

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
my car drives fine around town but at highway speeds or going up an incline it bogs or lunges and misses at traffic lights it has a slight miss when idling replace both coils and all 4 plug boots it ran good for a couple of days but now it seedms to be worse
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