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4、Fuel Injection System
Diagnosis Of Idle Speed Misfire
Idle speed misfire
Does the throttle valve
cable stuck so could not
be set-up?
1.
Connect the Data Scan and
check trouble content
2. Troubleshooting according
to the troubleshooting
procedure.
Connect the Data Scan
and enter into CO
adjustment at idle menu.
Positive value is for
enrichment, and negative
value is for lean.
Is the CO value in idle speed
out of set up range?
(0.5%~3.0%)
Is fuel enough?
接
怠
Are the battery wires loose?
正
Does the carbon deposited
onto the throttle valve body?
負
Replace with
new one for
confirmation
Is the vacuum hose leaking?
Does the by-pass valve
operate or out of order?
If the idle speed misfire problem
still can not be solved after check
above related EFI components
item by item, then check if the
other traditional components on
the engine is in abnormal.
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