Hey guys, just did a recent change of the plugs on my 98 2.4L Sunfire, used NGK TR55' gaped at .50, I changed the plugs and the first time I started the car I had a very strong vibration, first thing came to mind that one of them must not be fireing. I removed the cap again and rechecked all the rubber boots, one of the springs in one of them seems to be acting up but i'm certain it's touching. I put everything back and started up the car and seemed to be fine, went our for a test drive and the vibration came back. I didn't torque the plugs to 13lbs because my TW only starts from 25 so I just "eye"balled", so to speak. I now also have an engine light, any idea on what's going on? Does this sound like the car is still only running on 3 cyls?
