when idle its fine under load is when it misfires .
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2002 Infiniti Q45 Question: I have a Q45 infiniti 2002 code p0300 came up does it just need a tune up?
Answer #1Greg's Orange Auto (14628 Answers) , Orange, CA - (714) 361-9386globalhelper September 12, 2012, 15:39Master
it could need tune up coils or insulators. it could also be fuel related
Replyjason warburton, September 12, 2012, 15:53Rookie
where do you recomend i start so i dont waste so much money?
Replyglobalhelper, September 12, 2012, 16:12Master
with all do respect seek a mech opinion on the issues otherwise we are guessing. look for a good AAA approved repair shop in your area
Replyjason warburton, September 12, 2012, 16:15Rookie
thanks for your input.