Acura 3.5 RL Manual page 464

Evaporative Emission (EVAP) Two Way Valve Testing
1. Remove the fuel fill cap.
2. Remove the vapor line from the EVAP two way
valve (located above the EVAP canister), and con-
nect it to a T-fitting from a vacuum gauge and a
vacuum pump as shown.
'96 - 99 models:
VACUUM/PRESSURE
GAUGE
0 - 4 in.Hg
07JAZ - 001000B
VACUUM PUMP/
GAUGE, 0 - 30 in.Hg
A973X - 041 -
XXXXX
'00 - 04 models:
VACUUM/PRESSURE
GAUGE
0 - 4 in.Hg
07JAZ - 001000B
VACUUM PUMP/
GAUGE, 0 - 30 in.Hg
A973X - 041 -
XXXXX
3. Apply vacuum slowly and continuously while
watching the gauge. The vacuum should stabilize
momentarily at 0.8 - 2.1 kPa (6 - 16 mmHg, 0.2 - 0.6
in.Hg).
• If the vacuum stabilizes (valve opens) below
0.8 kPa (6 mmHg, 0.2 in.Hg) or above 2.1 kPa
(16 mmHg, 0.6 in.Hg), install a new valve and
retest.
4.
T-FITTING
T-FITTING
5.
Move the vacuum pump hose from the vacuum fit-
ting to the pressure fitting, and move the vacuum
gauge hose from the vacuum side to the pressure
side as shown.
'96 - 99 models:
PRESSURE
SIDE
'00 - 04 models:
PRESSURE
SIDE
Slowly pressurize the vapor line while watching the
gauge. The pressure should be stabilize momentarily
above 1.0 kPa (8 mmHg, 0.3 in.Hg).
• If the pressure momentarily stabilizes (valve
opens) above 1.0 kPa (8 mmHg, 0.3 in.Hg), the
valve is OK.
• If the pressure stabilizes below 1.0 kPa (8 mmHg,
0.3 in.Hg), install a new valve and retest.