I know EXACTLY what you're going through. I was a pack-a-day smoker until 3 years ago. I went cold turkey. It was hard to work on my car afterwards because smoking was such an integral part of the process -- work on the car, stop and have a smoke, back on the car for a while.
My strong advice: it's better NOT to work on your car for a while if that's what it takes. Find something else to do for a while if necessary.
