How long to wait after 3-step maintenance kit use? October 23, 2012 Solutions Central › How long to wait after 3-step maintenance kit use? 0 Vote Up Vote Down BPfan Staff asked 12 years ago When using the 3 step fuel system maintenance, how long do you wait on step 2 before starting your engine? 1 Answers 0 Vote Up Vote Down chemtooler Staff answered 12 years ago Allow for the container to empty just to the point that the engine stalls (varies by engine, usually from about 3 to 8 minutes). Please login or Register to submit your answer Username or Email Address Password Remember Me