Idle Speed/Ignition Timing/Idle Mixture Ratio Inspection
EF & EC-225flowchartGA16DE engine. Ignition timing 10° ± 2° B.T.D.C. checked in "N" position.
Checking and Adjusting Idle RPM and Ignition Timing
1
START
2
Visually check the following: Air cleaner clogging; Hoses and ducts for leaks; Electrical connectors; Gasket; Throttle valve and throttle sensor operation
3
Start engine and warm it up until water temperature indicator points to the middle of gauge. Ensure engine stays below 1,000 rpm.
4
Open engine hood and run engine at about 2,000 rpm for about 2 minutes under no-load.
5
Perform E.C.C.S. self-diagnosis (Mode II).
O.K.
return to step 7
N.G.
6
Repair or replace components as necessary.
7
Run engine at about 2,000 rpm for about 2 minutes under no-load. Race engine two or three times under no-load, then run engine for about 1 minute at idle speed.
8
CONSULT: 1) Select "IGN TIMING ADJ" in "WORK SUPPORT" mode. 2) Touching "START". OR (without CONSULT): 1) Turn off engine and disconnect throttle sensor harness connector. 2) Start engine.
9
Race engine (2,000 - 3,000 rpm) 2 or 3 times under no-load and then run engine at idle speed.
10
Check ignition timing with a timing light. 10° ± 2° B.T.D.C. (in "N" position)
N.G.
(I)
O.K.
11
(A)