Hey I really want to nail this issue I've got with my car. There's a misfire in cylinders 2 and sometimes 3. I have done the following;
Changed spark plugs
Changed coil overs
Changed fuel module
Ran compression test
Tested fuel injectors
Ran cleaner through motor
(Tests came back with no issues)...
So my focus popped up 3 codes to be specific
PO300- multiple cylinder misfire
PO302- cylinder 2 misfire
PO316- engine misfire on startup first 1000 rev
I originally thought it was my spark plugs which helped but didn’t stop it. What do you guys think and do you think I have to take it in or can...