Chery QQ6 Service Manual download pdf (Page 60)

12.5 Engine Speed is Normal, but it is Difficult to Start at any Time

No. Operating steps Result Follow up steps

Yes Remove the failure

displayed

1 Put the ignition switch to “ON”. Use a special

diagnostic tester to check if any failure

information record exists.

No Next step

Yes Next step 2 Check the air cleaner and look if it is open.

No Replace

Yes Next step 3 After starting successfully, check if air intake

consumption of the engine at idle speed is

around 300Kg/h (remember to check if cylinder

pressure is normal).

No Eliminate the

failure of air intake

system leaking

4 Step on the throttle slightly and observe if it is

easy to be started easily.

Yes Replace the

electronic throttle

body

Yes Next step 5 Connect fuel manometer valve. Short 30#, 87#

pins of fuel pump relay to make the fuel pump

run, and then check if fuel pressure is around

400kPa.

No 9

Yes 8 6 Use a special joint to directly supply a 12V

voltage and intermittent ground wire from

battery to injector and check if the injector

works normally (work intermittently).

No Next step

Yes Next step 7 Clean out the fuel injector and look if it can

work correctly.

No Replace fuel

injector

Yes Replace fuel 8 Replace fuel 8, and check if the fuel is

deteriorated or moisture.

No 14

Yes Next step 9 Check if the fuel pressure value is below 300

kPa.

No 13

Yes Next step 10 Close the fuel manometer valve. Re-engage the

ignition switch to let the fuel pump run for 3s,

and then check if fuel pressure can be built up.

No 12

Yes Replace fuel

pressure regulator

11 Open the valve of fuel gauge and clamp the oil

return pipe by oil return baffle so that the oil can

not return. Check if the oil pressure occurs

immediately.

No Repair and replace

fuel injector and oil

pipe

Yes Repair or replace

oil intake pipe

12 Check if there is leaking or jam in oil intake

pipe.

No Replace oil pump

13 Check if the oil return pipe is bended or

jammed.

Yes Repair or replace

oil return pipe

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Chery QQ6 Service Manual Page 60

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