I am new here looking for help

[ron lynn]

I have a 1999 grand prix gtp got a mis on 3 and 6 replaced coil pack still missing

[hulsizer70]

u must clear the misfire codes as well.I suggest a full tune up with all plugs and wires as well.the back 3 plugs are a challenge to a novice @ best.

[ron lynn]

most parts were new not even a year old turned out the icm which was about 7 months old went bad problem solved ty