Join Date: Apr 2009
Location: Gloucester, Va, USA
It wasn't that cold yesterday :-P. The only problem I had yesterday was storage. I had to wear so many layers on the way to work, and I had no where to put the extra clothing on the way home. No backfires though.
Another possible cause is high idle. When the ignition is turned off, the engine continues to pump unignited air and fuel into the exhaust. If the idle is high, quite a bit of fuel will be pumped into the exhaust while the engine spools down, only to be ignited when the engine is started again.
...just a theory anyway