jrdnhsnbrg
Active LVC Member
Well, Mary is borked again. I had to drive my car from my university to home this morning, which is about 40 miles of highway. When I started my car at school I noticed it was idling really rough so I grabbed my code reader and I'm getting P0303, cylinder 3 misfire. I replaced all the spark plugs with Motorcraft plugs 4k miles ago and all the ignition coils with Summit Racing coils at the same time, roughly 4k miles and 3 months ago. Any idea what could've gone wrong here?