Toyota Supra 1990 Manual page 161

EMISSION CONTROL SYSTEMS - Dash Pot (DP) System EC-9
7M-GE
DP Diaphragm
rpm
7M-GTE
Throttle Valve
Open
EC3319
(
Pinch:l-
/
7M-GE
7M-GTE
EC2J51
-
,
Throttle Valve
Released
2,000
1111
rpm
r /
I
""-"'~""<JI/,.,Ir Throttle Valve
~
,Released
I/I??
DP Set
Ir
2,000
11111'
rpm
EC3320
EC2354
INSPECTION OF DP SYSTEM
1. WARM UP ENGINE
2.
CHECK IDLING SPEED
3. CHECK DP SETTING SPEED
(a) Maintain the engine speed at 3,000 rpm.
(b) Pinch the vacuum hose between the DP and VTV.
(c) Release the throttle valve.
(d) Check that the DP is set.
DP setting speed: 2,000 rpm