Buick Repair Questions? Ask a Mechanic for Answers ASAP
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was there a code associated with the miss fire???
did you check the compression??
do you have a noid light to verify injectors are being commanded on??
ok, thanks. one of the first things I would do with a 300 code is to verify fuel pressure. very common failure of low fuel pressure to cause the miss fires. if you dont have a tester, you can rent one at a parts store.
I would go here next