It's Hard To Start The Cold Car - Chery A21 2005 Service Manual

CHERY·A21 SERVICE MANUAL

4. It's hard to start the cold car.

General failure component: 1), water in the fuel; 2), fuel pump; 3), coolant temperature
sensor; 4), injector; 5), ignition coil; 6), throttle valve and idle speed by pass port; 7),
engine mechanical part.
General diagnosis flow:
No.
Connect the fuel pressure meter ( connecting point is the
front end of fuel distributing pipe assembly fuel intake
pipe); start the engine and check fuel pressure at idle
1
speed if it is around 260kpa; take off the vacuum pipe
from fuel pressure regulator check the fuel pressure if it
Pull off one of the cylinder separating line and connect
spark plug to it; keep the spark electrode around 5mm
2
away from engine body; start the engine and check if
Take off the coolant temperature sensor joint and start the
engine; observe if the engine can be started successfully.
3
(or serial connecting a 2500Ωresistance at the joint of
coolant temperature sensor; observe if we can start the
Step on the accelerator slightly and observe if it is easy to
4
Disassemble the injector, check the injector using the
5
injector special cleaning analysis meter and observe if it
Check fuel conditions and check if the failure is appeared
6
Check pressure conditions of every cylinder and observe
7
Connect EFI system adaptor, turn on the ignition switch;
check the power supply of pin No.12, 13, 44, 45 and
8
No.63 if it is in right conditions; check pin armature of
No.3, 51, 53, 61 and No.80 if it is in right conditions.
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Operating steps
is around 300kpa.
there is blue and white high pressure fire.
engine)
be started
is leaking or jammed.
after the fuel refilling
if there is insufficient pressure
56
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ENGINE EFI SYSTEM
Result Follow up steps
Yes Next step
Repair the fuel
No
supplying system
Yes Next step
Check and repair
No
ignition system
Repair circuit or
Yes
replace sensor
No Next step
Clean throttle
Yes valve and idle
speed air port
No Next step
Yes Replace the part
No Next step
Yes Change fuel
No Next step
Yes Trouble shoot
No Next step
Yes Diagnosis help
Check correspond
No
circuit