Hello all, I have a 2001 TJ, I had a check engine light with a code of p0306. So i decided to change out my Spark Plugs. (Note it was fine before the check engine light) Any way changed the Spark Plugs (NGK) set them at .035 gap per manual and disconnected the battery to reset the check engine light. Started it, Now I hear a loud Ticking noise and my dash flickers all the warning lights then goes away after a bit but the noise is still there. Idles fine starts fine, just the flickering and the loud ticking is now the issue. The check enging light has not come back on but i have not driven it either. Any ideas?