2009 CHERY TIGGO engine

Downloaded from www.Manualslib.com manuals search engine Fuel Delivery System (Page 3 of 6)
GENERAL INFORMATION
LTSMW040003T
04–8Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Fuel Delivery System (Page 4 of 6)
GENERAL INFORMATION
LTSMW040004T
04
04–9Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Fuel Delivery System (Page 5 of 6)
GENERAL INFORMATION
LTSMW040005T
04–10Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Fuel Delivery System (Page 6 of 6)
GENERAL INFORMATION
LTSMW040006T
04
04–11Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine DIAGNOSIS & TESTING
Fuel Pressure Test
WARNING!
Fuel in the fuel system remains under high pressure, even when the engine is not running. Before servicing or
disconnecting any of the fuel lines or fuel system components, the fuel system pressure must be relieved to
prevent accidental spraying of fuel (See Fuel Pressure Relief Procedure in Section 04 Fuel Delivery). Failure to
follow these instructions may result in serious personal injury or death.
Perform the following procedure to test for proper fuel pressure.
WARNING!
Wrap towels around hoses to catch any gasoline spillage.
1. Remove the protective cap and connect the fuel pressure gauge (2) to the fuel rail service test port pressurefitting (1) on the fuel rail (3).
2. Start and warm the engine and note the pressure gauge reading:
1.6L & 1.8L & 2.0L
• Fuel pressure at idle: 400-420 kPa (4.0 - 4.2 bar)
BESM030020
04–12Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 2.4L
•Fuel pressure at idle: 320-350 kPa (3.2 - 3.5 bar)
3. If engine runs, but pressure is below minimum pressure, check the following: a. Check for a kinked fuel supply line between the fuel rail and the fuel pump, repair if necessary.
b. Check the fuel filter for blockage, and replace the fuel filter if necessary (See Fuel Filter Removal & Installa-
tion in Section 04 Fuel Delivery).
c. Check the fuel pump, and replace if necessary (See Fuel Pump Removal & Installation in Section 04 Fuel
Delivery).
4. If operating pressure is above the maximum pressure, the electric fuel pump is OK, but fuel pressure regulator is defective. Replace the fuel pressure regulator (See Fuel Pump Removal & Installation in Section 04 Fuel
Delivery).
NOTE:
• The 1.6L & 1.8L & 2.0L fuel pressure regulator is integrated into the fuel pump assembly and is not serviced
separately.
• The 2.4L fuel pressure regulator is connected to the fuel rail, and is serviced separately.
5. Install the protective cap to the service test port pressure fitting (1) on the fuel rail.
Observe the following fuel pressures when testing:
FUEL PRESSURE - 1.6L & 1.8L & 2.0L
Key On 400 kPa (4.0 bar)
Engine Idle 400-420 kPa (4.0 - 4.2 bar)
Key Off 380 kPa (3.8 bar) in 10 minutes
FUEL PRESSURE - 2.4L
Key On 329 kPa (3.29 bar)
Engine Idle 320-350 kPa (3.2 - 3.5 bar)
Key Off 350 kPa (3.5 bar) in 10 minutes
Fuel System Troubleshooting Chart
CONDITIONPOSSIBLE CAUSES CORRECTION
No Start/Hard Start/Start and then
Stall · Contaminated fuel
· Low fuel pressure
· Restricted fuel filter
· Fuel pump relay inoperative
· Restricted or leaking fuel lines
· Fuel pressure regulator· Drain, flush and refill fuel system.
· Check fuel pump pressure.
· Replace fuel filter.
· Test fuel pump relay.
· Inspect/replace necessary fuel
line(s), perform fuel system air
purge.
· Inspect/replace the fuel pump if
necessary.
Stalls Under Aggressive Maneuvers/
Loss Of Fuel Pressure · Restricted or damaged fuel filter
· Contaminated fuel
· Damaged fuel tank· Replace fuel filter.
· Drain, flush and refill fuel system.
· Replace fuel tank.
Cannot Refill Fuel Tank/Excessive
Pressure in Fuel Tank When Cap is
Removed · Sticking or damaged fuel tank
fill/vent valve, hose or lines.
· Inspect, repair vent hose and lines,
replace fuel tank.
DIAGNOSIS & TESTING
04
04–13Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Fuel Pump Troubleshooting Chart
CONDITIONPOSSIBLE CAUSES CORRECTION
Symptoms of a Defective Fuel Pump · Noisy operation
· Poor acceleration
· Failure to start (starting difficulties)· Replace the fuel pump
Reasons For Fuel Pump Failure · Accumulated contaminants causing
an insulation layer
· Fuel pump bushing and armature
blocked
· Eroded fuel level sensor
components· Replace the fuel pump
Fuel Injector Troubleshooting Chart
CONDITION
POSSIBLE CAUSES CORRECTION
Symptoms of a Defective Fuel
Injector(s) · Poor idling
· Poor acceleration
· Failure to start (starting difficulties)
· Replace the fuel injector(s)
Reasons For Fuel Injector Failure · An accumulation of contaminants
inside the injector due to lack of
maintenance· Clean injectors regularly with an
approved method
DIAGNOSIS & TESTING
04–14Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine ON-VEHICLE SERVICE
Fuel Pressure Relief Procedure
Description
WARNING!
Fuel in the fuel system remains under high pressure, even when the engine is not running. Before servicing or
disconnecting any of the fuel lines or fuel system components, the fuel system pressure must be relieved to
prevent accidental spraying of fuel. Failure to follow these instructions may result in serious personal injury or
death.
Perform the following procedure to relieve fuel pressure from the fuel system:1. Remove the cover of the front fuse and relay box.
2. Identify and remove the fuel pump relay from the front fuse and relay box.
3. Start and run engine until it stalls.
4. Attempt to restart engine until it will no longer run.
5. Turn the ignition key to the OFF position.
Fuel Pump
Description
The fuel pump assembly contains the fuel pump motor and fuel level sensor.
Operation
The Engine Control Module (ECM) activates the fuel pump relay for several seconds after the ignition switch is
turned ON. When the relay is activated, it provides voltage to the fuel pump. When the ECM receives an engine
speed signal from the Crankshaft Position (CKP) sensor and a signal from the Immobilizer control module, the ECM
will energize the fuel pump relay.
NOTE :
• The electric fuel pump has different flow ratings based on engine requirements
• For service, the part number of the replacement fuel pump must be the equivalent of the original fuel pump
• Do not operate the fuel pump dry, this will damage the fuel pump
• Keep the fuel tank and pipeline clean, and replace the fuel filter if the fuel pump is replaced
Removal & Installation
WARNING!
Release fuel system pressure before servicing fuel system components. Service vehicles in well-ventilated areas
and avoid ignition sources. Never smoke while servicing the vehicle. This may result in personal injury or death.
NOTE :
The following special tool is required to perform the repair procedure:
•CH-20032 - Fuel Pump Remover
1. Release the fuel system pressure (See Fuel Pressure Relief Procedure in Section 04 Fuel Delivery).
2. Disconnect the negative battery cable.
3. Remove the rear seat cushion.
04
04–15Chery Automobile Co., Ltd.