Rio L4-1.6L (2004)
2. Apply a suction and pressure to the hose from the engine side. Verify that air flows only toward the engine. If the air passes in both directions or
not at all, replace the vacuum hose (along with the check valve).
2. Apply a suction and pressure to the hose from the engine side. Verify that air flows only toward the engine. If the air passes in both directions or
not at all, replace the vacuum hose (along with the check valve).