Chery SQR 7160 sedan. Manual — part 38
CAC Gasoline Engine Maintenance And Servicing Manual
70
7. Ignition coil assembly.
8.
Connector wiring harness assembly.
Connector wiring assembly
Ignition coil assembly
Fig. 132
type
CAC Gasoline Engine Maintenance And Servicing Manual
71
Carburetor engine faults ,causes and corrections
1.engine does not run during starting:
Cause
correction
(1). Battery wires are loose or corroded
reconnect or replace the
wires .
(2). Battery is discharged or damaged
recharge or replace the
battery .
(3). Starter circuits is opened or loosed or not energized
energize or replace the harness
(4). Starter solenoid valve or switch is damaged
replace starter solenoid valve or
switch
(5). Starter is damaged
replace starter
(6). Flywheel gear ring or starter pinion is loosed or damaged
replace flywheel gear ring or
starter
(7). No engine ground wire or ground wire is disconnected
connect or replace the ground
wire
2. engine runs but no spark exists during starting:
Cause
correction
(1). No fuel in fuel tank
fuel the tank
(2). No fuel in the carburetor float chamber
keep
trying
to
start
engine
(3). Battery is discharged(engine run slowly)
recharge or replace battery
(4). Battery wire connector is loosed or corroded
reconnects or replace battery
(5). Ignition parts is damp or damaged
replace ignition parts
(6). Ignition part harness is opened ,loosed or not energized. Reconnect or replace harness
(7). Spark plug is burned away, damaged or
Spark plug gap is not correct.
Replace spark plug
(8). Main mechanism is damaged(for example, camshaft)
check and service
(9). Fuel pump is damaged
replace pump
(10).Carburetor float chamber needle valve is binding or
oil strainer is blocked check, service and clean
(11).Idle cut-off valve does not open
check circuit and solenoid
3. difficult to start for engine when temperature is low:
Cause
correction
(1). Battery discharged
recharge battery
(2). Battery connector loosed or corroded
connect or replace the battery wires.
(3). Spark plug is corroded , damaged or the
Spark plug gap is not right. Replace spark plug
(4). Other ignition system problem
s
check and service
(5). Low cylinder compression pressure
sent to service spot for check and service
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4. difficult to start for engine when temperature is high:
Cause
correction
(1). Air filter is dirty or blocked
clean air filter core or replace case
(2). low cylinder compression pressure
sent to service spot for check and
service
(3). Hydraulic valve lifting rod is damaged
replace the lifting rod
5. The starter noise or rough engagement.
Cause
correction
(1). Flywheel gear ring or starter’s pinion loose or broken
replace flywheel gear ring or starter
(2). Starter retaining bolt loose or missing
tighten retaining bolt or replace bolt
(3).the parts in Starter worn out or damaged
replace starter
6.Engine stalls right away after started.
Cause
Correction
(1). Ignition coil connection loose or damaged
connect ignition coil or replace ignition coil
(2). Vacuum leakage in intake manifold
replace sealing gasket or replace connecting
pipe
(3) carburetor float
position not proper
check carburetor float or needle valve
(4). mail measuring orifice blocked
check and clean mail measuring orifice
(5). Idle cut-off valve damaged and not open
check circuit and solenoid
(6). Idle speed too low
adjust engine idle speed
(7). idle speed
fuel outlet port or transition port blocked check and clean
7.Rough engine idle speed
Cause
Correction
(1). Air filter core blocked
clean or replace
(2). vacuum leakage in Intake manifold or relevant hose
check and service
(3). Spark plug corroded, damaged or
Spark plug gap not correct replace spark plug
(4). Hydraulic valve lifting rod damaged
replace the lifting rod
(5). Idle speed fuel outlet port or transition port
blocked check and clean
(6). fast idling adjustment not correct check fast idling spring for
fallout ,readjustment.
(7). Low or unstable Cylinder compression pressure
check and service
CAC Gasoline Engine Maintenance And Servicing Manual
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(8). Timing belt tightening incorrectly
adjust timing belt tension
(9). Idle mixture too rich or lean
adjust carburetor idle mixture adjustment screw
8. engine Stalls during idling:
Cause
Correction
(1). Low idle speed
adjust idle speed
(2).fuel outlet port or transition port for Idle speed
blocked check and clean
(3). Choke not open or out of work
check choke system
(4). carburetor float
position not proper
check carburetor float or needle valve
(5). Spark plug corroded , damaged or
Spark plug gap not right.l replace spark plug
(6). High tension wire damaged
replace high tension wire
(7). Ignition timing not correct
adjust ignition timing
(8). Hydraulic valve lifter damaged
replace Hydraulic valve lifting rod
(9). low or unstable cylinder compression pressure
check and service
(10). PCV hose loose, leaking, or damaged
connect or replace
9. engine Stalls within operation speed range
Cause
Correction
(1). Fuel filter blocked
replace fuel filter
(2). Fuel pump working incorrectly or low
output pressure replace fuel pump
(3). Tank ventilation hole clogged or fuel hose
clogged dredge the hose
(4). Carburetor float needle valve binding
service or replace
(5). Intake manifold or connecting hose
vacuum leakage check, service or replace
(6). Spark plug corroded , damaged or
Spark plug gap abnormal replace spark plug
(7). High pressure wire damaged
replace
(8). Ignition coil damaged
replace
(9). Low or abnormal cylinder compression pressure measure pressure and service
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