Hey folks: I've got a smoke issue that I'd like to resolve if possible. My 13BT seems to smoke excessively at start up after it's been sitting for a while. Happens in warm and cold temps. Smoke looks white/gray and lasts for about 20 seconds. Seems to go away immediately once I start driving--or maybe I just can't see it. I've read most of the the threads on this topic but still can't tell if this is normal. Are there things I can do to reduce this smoke? Thanks in advance.