My 1987 FJ60 will have an occasional "backfire" puff come through the a/c vents during startup. Happens only once and is minor. Will happen again is left to sit a bit and restarted. I know of another FJ60 that does this also. It smells exhaust like in nature which is odd since the a/c vents are isolated from any exhaust. The heat/AC controls are mechanically operated so to the best of my knowledge there is no vacuum operated items under the dash that would contribute to this. Anyone out there run into this and know what the cause, and more importantly, the cure is?
Thanks...Don
Thanks...Don