240 L4-2127cc 2.1L SOHC Turbo B21FT FI (1982)
Pulsed Secondary Air Injection: Testing and Inspection
Fig. 104 CHECKING PULSAIR SYSTEM
B21A engine (Canada market only, non turbo)
Check that:
- all connections are tightened and not leaking.
- hoses are intact.
Checking non-return valves:
Remove the hose connections from the non-return valves. Start the engine and hold your hand over the valves. Fig. 104. You should be able to feel that
air is being sucked in through the valves, but no exhaust is allowed to exit though the valves. Faulty non-return valves must be replaced. Faulty
non-return valves may result in backfiring, and exhaust gases can enter the air cleaner.
Fig. 105a CHECKING PULSAIR SHUT-OFF VALVE
Check shut-off valve (on later engines only):
- connect a CO meter
- check that the shut-off valve is open when the engine is idling.
- remove the hose from the air filter.
