Answer: BACKFIRE

AnswerCrossword Clue
BACKFIREWork out badly, in a way
BACKFIREBoomerang
BACKFIREProduce an undesirable result
BACKFIREStreet noise.
BACKFIREProduce an undesired effect
backfireto go wrong
backfire(of an engine) Undergo a mistimed explosion in the cylinder or exhaust
backfire(of a plan or action) Rebound adversely on the originator; have the opposite effect to what was intended