ENGINE AND EMISSION CONTROL ± Emission Control System
17-11
PURGE CONTROL SYSTEM CHECK
1. Disconnect the vacuum hose (red stripe) from the throttle
body and connect it to a hand vacuum pump.
2. Plug the nipple from which the vacuum hose was removed.
3. When the engine is cold or hot, apply a vacuum of 53
kPa, and check the condition of the vacuum.
When engine is cold
(Engine coolant temperature: 40_C or less)
Engine condition Normal condition
At idle Vacuum is maintained
3,000 r/min
When engine is hot
(Engine coolant temperature: 80_C or higher)
Engine condition Normal condition
At idle Vacuum is maintained
3,000 r/min (fore
approximately 3 minutes
after the engine is started.)
Vacuum will leak.
PURGE PORT VACUUM CHECK
1. Disconnect the vacuum hose (red stripe) from the throttle
body purge vacuum nipple and connect a hand vacuum
pump to the nipple.
2. Start the engine.
3. Check that vacuum is produced almost constantly
regardless of engine revolution.
4. When the vacuum is not produced, clean the hose as
it may be clogged.
Plug
Vacuum hose
(red stripe)
Vacuum hose
(red stripe)
Vacuum
Engine speed (r/min)
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