***Definition*** :: Afterfiring, sometimes called afterburning, often results when the fuel/air mixture is too rich. Overly rich mixtures are also slow burning, therefore, charges of unburned fuel are present in the exhausted gases. Air from outside the exhaust stacks mixes with this unburned fuel that ignites. This causes an explosion in the exhaust system. Afterfiring is perhaps more common where long exhaust ducting retains greater amounts of unburned charges. As in the case of [[Backfiring]], the correction for afterfiring is the proper adjustment of the fuel/air mixture. ***Source*** :: [[AMT Powerplant Handbook]] #glossary