So lately I’ve been experiencing something weird a missfire with no check engine light at all but it can be felt hard sometimes . With the SCT tune it’s less but still enough to be felt mostly on Decel and without the tune it’s like highways speeds 55-65 it’s just misfire city spark plugs are fresh and I’m not geting a check engine light at all for that I have codes for o2 censors since I have a off-road midlife and other stuff lately the car has just felt completely sluggish not on its toes . It is a higher mileage cobra it’s at 151k miles so I don’t expect much from it but still it just doesn’t feel right any idea what I can check out on I don’t know where to start