Maintenance Manual for Chery·Windcloud Marelli EFI System
14). Poor performance and disability occur during acceleration
Yes Re p a ir 1 Check if there exists failure of clutch slipping,
low tire pressure, braking drag, incorrect tire
size, four-wheel alignment error and etc.
No Go to next step
Yes Go to next step 2 Check if throttle can be fully opened.
No Replace or repair
throttle
Yes Elimilate failure
displayed
3 Set ignition switch in “ON”. Check with scanner
to see if there is failure information record.
No Go to next step
Yes Go to next step 4 Make engine run at idle speed, and check to see
if ignition advance angle is normal after coolant
temperature reaches normal value.
No Check others
Yes Go to next step 5 Set ignition switch in “ON”. Connect
commutator between ECU and wire harness,
and check respectively the voltages of pins
concerning ECU’s manifold absolute pressure
sensor, throttle position sensor, intake air
temperature sensor and coolant temperature
sensor, ECU oxygen ground terminal and signal
output terminal, ECU sensor signal ground
terminal as well as ECU32, 33# pins as 4.5- 5V
sensor power to see if they are in good order.
No Repair or replace
wire harness
Yes Go to next step 6 Make engine run at idle speed, and check if
intake pressure is 35-55Kpa.
No
Overhaul
Yes Go to next step 7 Connect fuel pressure gauge valve. Strap the
30# and 87# pins of fuel pump relay to make
fuel pump work, and then check if fuel pressure
is at about 350kPa.
No Go to step 11
Yes Go to step 10 8 Provide 12V voltage directly from accumulator
to injector with special connector, and check if
injector is working in good order.
No Go to next step
Yes Go to next step 9 Recheck injector to see if it is working in good
order after cleaning.
No Replace injector
Yes Replace fuel 10 Check if fuel is deteriorated or contains water.
No Go to step 16
Yes Go to next step 11
Check if fuel pressure is lower than 350kPa
No Go to step 15
Yes Go to next step 12 Shut down fuel gauge valve. Switch on ignition
switch again to make fuel pump work once
more, and check if fuel pressure is established.
No Go to step 14
13 Turn on fuel guage valve, clamp fuel return pipe
with fuel return interceptor to ensure no fuel
Yes Replace pressure
regulator
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