Had code P2137 Ignition Coil "F" secondary circut. Also a code for misfire on #6 cylinder. I bought a new coil for #6 and should take care of the problem, so i thought. Nope. Now, I only have code P2137 Ignition Coil "F". It doesn't specify misfire on #6 anymore but the car is running like crap and the engine light presists. I swapped #5 and 6 cylinder coils to ensure it wasn't a bad new coil. It changed nothing. Going to look wiring over tomorrow. I will add that this problem occured after the car sat in the driveway for 4 days without starting and plenty of rain. Possible that rodents did a job on the wiring?