Regular Starts But The Idle Speed Is Not Steady At Any Time - Chery A21 2005 Service Manual

CHERY·A21 SERVICE MANUAL

6. Regular starts but the idle speed is not steady at any time.

General failure component: 1), water in fuel; 2), injector; 3), spark plug; 4), throttle
valve and idle speed by pass port; 5), air intake port; 6), idle speed regulator; 7),
ignition timing; 8), spark plug; 9), engine mechanical.
General diagnosis flow:
No.
Check the air cleaner if it is jammed; check the air intake
1
2
Check spark plugs in every cylinder and observe its type
3
Check the throttle valve and idle speed by pass if there is
4
Disassemble the injector, check the injector using the
5 injector special cleaning analysis meter and observe if it is
Check fuel conditions and check if the failure is appeared
6
Check pressure conditions of every cylinder and observe if
7
there is big pressure difference between the cylinders.
Check the engine ignition order and ignition timing if it is
8
Connect EFI system adaptor, turn on the ignition switch;
check the power supply of pin No.12, 13, 44, 45 and No.63
9
if it is in right conditions; check pin armature of No.3, 51,
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Operating steps
port if it is leaking.
Check idle speed regulator if it is partial blocked
and clearance if it is accord with the regulation.
carbon deposition.
leaking or jammed.
after the fuel refilling
accord with the regulation.
53, 61 and No.80 if it is in right conditions.
58
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ENGINE EFI SYSTEM
Result Follow up steps
Repair the air
Yes
intake system
No Next step
Clean or
Yes
replace
No Next step
Yes Next step
Adjust or
No
replace
Yes Cleaning
No Next step
Yes Replace part
No Next step
Yes Change fuel
No Next step
Yes Trouble shoot
No Next step
Yes Next step
Repair the
No
ignition timing
Yes Diagnosis help
Repair the
No corresponding
line