|
|
CHERY·A21 SERVICE MANUAL ENGINE EFI SYSTEM 55 3. It is hard to start the heating car. General failure component: 1) water inside of fuel; 2) fuel pump; 3) coolant General diagnostic flow No. Operating steps Result Follow up steps Yes Next step 1 Connect the fuel pressure meter ( connecting point is the front end of fuel distributing pipe assembly fuel intake pipe); starting the engine and check fuel pressure at idle speed if it is around 260kpa; take off the vacuum pipe from fuel pressure regulator check the fuel pressure if it is around 300kpa. No Repair the fuel supplying system Yes Next step 2 Pull off one of the cylinder separating line and connect spark plug to it; keep the spark electrode around 5mm away from engine body; start the engine and check if there is blue and white high pressure fire. No Repair the ignition system Yes Repair circuit or replace sensor 3
Take off the coolant temperature sensor joint and start the engine; observe if the engine can be started successfully. (or serial connecting a 300Ωresistance at the joint of coolant temperature sensor; observe if we can start the engine) No Next step Yes Repair or replace 4 Check if there if loosen or leaking of the fuel pressure regulator vacuum pipe.. No Next step Yes Change fuel 5 Check fuel conditions and check if the failure is appeared after the fuel refilling No Diagnosis help Yes Diagnosis help 6 Connect EFI system adaptor, turn on the ignition switch; check the power supply of pin No.12, 13, 44, 45 and 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.
Check correspond circuit |