just to get this straight because there are lots of threads and i have been stressing over this stupid car:spin:
Solid CEL light
blinking cruise
blinking SI drive
Car runs like there is nothing wrong, no stutter, no hesitation, no unusual noise/knocking
code pulled P0304 misfire #4
Plugs were changed 5k miles ago
only 1 high flow cat
99k miles stage 2 334whp/375wtq fine till now.
some say
gas cap
vac line
fuel inj
spark plugs
coil pack
valves
ringland
if the car is running fine what can i eliminate from the list of issues. Ive never experienced anything like this were a code pulls up and the car runs like new.