Back Pressure Valve (Test for Functioning)
Remove air hose located in front of valve. No exhaust gases must escape while engine is running. Using a dull pin, check if the valve plate lifts from its seat and permits air to pass through.
Remove air hose located in front of valve. No exhaust gases must escape while engine is running. Using a dull pin, check if the valve plate lifts from its seat and permits air to pass through.