Acura 3.5 RL Manual page 462

Emission Control System
Evaporative Emission (EVAP) Controls (cont'd)
7. Connect a second vacuum pump to the fuel tank
vapor signal tube.
FUEL TANK VAPOR
SIGNAL TUBE
8. Apply vacuum (1 pump) to the fuel tank vapor sig-
nal tube, then check the vacuum on the pump in
step 6.
• If the vacuum holds, replace the Fuel Tank Vapor
Control valve.
• If the vacuum is released, the Fuel Tank Vapor
Control valve is OK.
9. Disconnect the fuel tank vapor vent tube from the
EVAP canister, then plug the port on the canister.
Reapply vacuum (80 pumps).
• If the vacuum holds, replace the Fuel Tank Vapor
Control valve.
• If the vacuum does not hold, inspect the EVAP
canister vent shut valve O-ring. If the 0-ring is
OK, replace the EVAP canister and repeat step 4.
VACUUM
PUMP/GAUGE,
A973X - 041 - XXXXX