backfire

(n) the backward escape of gases and unburned gunpowder after a gun is fired blowback,
(n) a loud noise made by the explosion of fuel in the manifold or exhaust of an internal combustion engine
(n) a fire that is set intentionally in order to slow an approaching forest fire or grassfire by clearing a burned area in its path
(n) a miscalculation that recoils on its maker boomerang,

(v) come back to the originator of an action with an undesired effect
- Your comments may backfire and cause you a lot of trouble
backlash, recoil,
(v) emit a loud noise as a result of undergoing a backfire
- My old car backfires all the time
(v) set a controlled fire to halt an advancing forest to prairie fire

backlash recoil blowback boomerang