Suzuki Swift User Manual page 122

STEP
6 Check PCV valve for clogging (See Section 6E1).
Is it in good condition?
7 Check EVAP Canister Purge Valve for Closing.
1) Disconnect purge hose (1) from EVAP canister.
2) Place finger against the end of disconnected hose.
3) Check that vacuum is not felt there, when engine is
cool and running at idle. See Fig. 5.
Is vacuum felt?
8 Check intake manifold pressure sensor for performance
(See Section 6E1).
Is it in good condition?
9 Check engine coolant temp. sensor for performance
(See Section 6E1).
Is it in good condition?
10 Check parts or system which can cause engine rough
idle or poor performance.
– Engine compression (See Section 6A).
– Valve lash (See Section 6A).
– Valve timing (Timing belt installation. See Section 6A).
Are they in good condition?
Fig. 1 for Step 3
Fig. 4 for Step 5
ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10) 6-71
ACTION
Fig. 2 for Step 3
1. Injector connector
Fig. 5 for Step 7
No good
Good
YES
Go to Step 7. Replace PCV valve.
Check EVAP Go to Step 8.
control system
(See Section 6E1).
Go to Step 9. Repair or replace.
Go to Step 10. Replace engine
coolant temp.
sensor.
Check wire harness Repair or replace.
and connection of
ECM (PCM) ground,
ignition system and
fuel injector for
intermittent open
and short.
Fig. 3 for Step 4
NO
1. Throttle body
2. Fuel feed hose