Secondary Air Valve Check; Vacuum Tank Check - Mitsubishi LANCER EVOLUTION-IV 1998 Workshop Manual

15-6
A
B
A
B
INTAKE AND EXHAUST –

8. SECONDARY AIR VALVE CHECK

(1) Remove the secondary air valve.
(2) Connect a hand vacuum pump to the secondary air valve
(3) Apply a vacuum of 67 kPa {500 mmHg} and check that
(4) Blow air from side (A) and side (B) of the secondary

9. VACUUM TANK CHECK

(1) Connect a hand vacuum pump to nipple A of the vacuum
(2) Connect a hand vacuum pump to nipple B of the vacuum
(3) Apply a vacuum of 67 kPa {500 mmHg] with nipple A
On-vehicle Service
nipple.
the vacuum is retained.
air valve to check for air passage.
Vacuum
0 kPa
(vacuum not applied)
40 kPa {300 mmHg}
or more or more
tank. Applying a vacuum of 67 kPa {500 mmHg}, check
that the vacuum is retained.
tank.
plugged with a finger. Check that the vacuum leaks when
the finger is then released.
Air blowing direction Air passage
(A) → (B)
No
(A) → (B)
Yes
(B) → (A)
No