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6-84 ENGINE GENERAL INFORMATION AND DIAGNOSIS
Step
7
Check EVAP Canister Purge Valve for Closing.
1) Disconnect purge hose from EVAP canister purge
valve.
2) Place finger against the end of EVAP canister purge
valve.
3) Check that vacuum is not felt there, when engine is
cool and running at idle. See Fig. 6.
Is vacuum felt?
8
Check MAP Sensor for performance (See DTC P0105
Diag. Flow Table).
Is it in good condition?
9
Check ECT 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 6A1).
• Valve lash (See Section 6A1).
• Valve timing (Timing belt installation. See Section
6A1).
Are they in good condition?
Fig. 1 for Step 3
Fig. 2 for Step 4
1
1
Action
1. Fuel pressure gauge & 3 way joint
2. Fuel feed hose
2
Yes
Check EVAP control
system (See Section
6E1).
Go to Step 9.
Go to Step 10.
Check wire harness
and connection of
ECM ground, ignition
system and fuel injec-
tor for intermittent
open and short.
No
Go to Step 8.
Repair or replace.
Replace engine
coolant temp. sen-
sor.
Repair or replace.
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