Mitsubishi 3000GT Service Manual page 519

ENGINE AND EMISSION CONTROL - Emission Control Svstem
Throttle body
Evaporative emission
relay
3
Engine control
module
Volume air flow sensor
Barometric pressure sensor
Disconnect the vacuum hose (red stripes) from the throttle
body and connect it to a hand vacuum pump.
Plug the nipple from which the vacuum hose is discon-
nected.
Under the engine conditions shown below, check by appiy-
ing vacuum from a hand vacuum pump.
Engine'operating
Applying vacuum
condition
Idling 375 mmHg
(14.8 in.Hg)
Engine operating
Applying vacuum
condition
Idling 3 7 5 mmHg
(14.8 in.Hg)
3,000 rpm within Try applying
three minutes after vacuum
starting engine
3,000 rpm after 375 mmHg
three minutes have (14.8 in.Hg)
elapsed after start-
ing engine
NOTE
* The vacuum will leak continuously if the altitude is 2,200 m (7,200
I
ft.) or higher, or the intake air temperature is 50°C (122°F)
higher.
Result
Vacuum is main-
tained
Result
I
Vacuum is main-
tained
Vacuum leaks
Vacuum will be
maintained momen-
tarily, after which it
will leak*.
or