197 cup
my 197 seems to have started misfireing noticed it this morning once its heated up if u stand outside it seems to be misfireing. well u can hear it coming from the exhaust say every 10-13 seconds any ideas wat this maye be the cars done 17000 miles. thought it may be the spark plugs but ive been told they are long life plugs and should not need changed untill 70000 miles
