I have a 2008 9.3 convertible. It is garage kept. When it gets below 32 degrees and I start it up everything is fine. When I back out of the garage the check engine light comes on. The code comes up as a misfire on cylinder 4. This never happens in warm weather. It first started at the end of last winter and stopped when it got warmer.
I replaced all the plugs and replaced the ignition coil on cylinder 4. When it gets cold now the check engine light comes on again.
The car does not sputter or lose any power when the light comes on. I just erase the code and all is fine until the next cold day. Getting tired of resetting code and don't want to do any damage to engine. Can anyone help?