Patients can be assured that an ABPN board-certified psychiatrist has specialized skills and knowledge to diagnose and treat problems ranging from emergencies to the long-term medical management of psychiatric disorders. The conditions psychiatrists treat include disorders such as: Depressive disorders.
Answer   A backfire is caused by unburned fuel and air getting into a hot exhaust system where it ignites. Plugs have nothing to do with it. Some cars, when they ar â¦ e turned off, pass enough fuel and air, that isn't being burned in the now-turned-off cylinders to cause a backfire.
Intake Timing. The fuel/air ratio that is ignited depends greatly on the intake valve. If the intake valve is not opening and closing at the proper times, such as if the spark plugs fire before the intake valve closes, the spark will light the fuel that is in the intake manifold and cause the backfire.