18. EVAPORATIVE/EXHAUST EMISSION CONTROL SYSTEM AIR INJECTION CUT-OFF VALVE Air Injection Cut-off Valve INSPECTION Inspect the air injection cut-off valve flow Vacuum Pump using a vacuum pump. If the flow is not within the specified values, replace with a new one. The flow should be at least 30 liter/min when a vacuum of 250mm/Hg is applied. The flow should be at least 1.6 liter/min when a vacuum of 320mm/Hg is applied. Check each connecting tube for cracks or damage and replace if necessary. INSTALLATION The installation sequence is the reverse of removal. When installing, be careful not to bend or twist the tubes and check for proper installation. The tube length is very important to its performance, use the tube of same specification for replacement. 4