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4.9
ELECTRONIC FUEL INJECTION
4
Fuel Lines - Quick Connect
RANGER EFI
models use quick connect fuel lines. Refer to the
steps below for fuel line removal.
1.
Place a shop towel around the fuel line to catch any
dripping fuel. Squeeze the connector tabs together and
push the locking slide back.
2.
Pull on the fuel line for removal.
3.
To install the line, verify the connector and fuel tank nipple
are clean and free of debris.
4.
Snap the fuel line back over the nipple and slide the locking
mechanism back into place. Verify the connector tabs snap
back into place.
ELECTRONIC FUEL INJECTION
Principal Components
The Electronic Fuel Injection (EFI) system is a complete engine
fuel and ignition management design. This system includes the
following principal components:
• Fuel Pump
• Fuel Rai
l
• Fuel Line
• Fuel Filter(s)
• Fuel Injectors
• Pressure Regulator
• Throttle Body / lntake Manifold
• Engine Control Unit (ECU)
• Ignition Coils
• Engine Coolant Temperature Sensor (ECT)
• Throttle Position Sensor (TPS)
• Crankshaft Position Sensor (CPS)
• Intake Air Temperature and Barometric Air
Pressure Sensor (T-BAP)
• Wire Harness Assembly
• Check Engine Light
EFI Operation Overview
The EFI system is designed to provide peak engine performance
with optimum fuel efficiency and lowest possible emissions.
The ignition and injection functions are electronically
controlled, monitored and continually corrected during
operation to maintain peak performance.
The central component of the system is the Bosch Engine
Control Unit (ECU) which manages system operation,
determining the best combination of fuel mixture and ignition
timing for the current operating conditions.
An in-tank electric fuel pump is used to move fuel from the tank
through the fuel line and in-line fuel filter. The in-tank fuel
pressure regulator maintains a system operating pressure of 39
psi and returns any excess fuel to the tank. At the engine, fuel is
fed through the fuel rail and into the injectors, which inject into
the intake ports. The ECU controls the amount of fuel by varying
the length of time that the injectors are "on." This can range from
1.5-8.0 milliseconds depending on fuel requirements. The
controlled injection of the fuel occurs each crankshaft
revolution, or twice for each 4-stroke cycle. One-half the total
amount of fuel needed for one firing of a cylinder is injected
during each injection. When the intake valve opens, the fuel/air
mixture is drawn into the combustion chamber, ignited and
burned.
Squeeze Connector Tabs
Summary of Contents for 2009 Ranger RZR 800 EFI
Page 10: ...1 10 GENERAL INFORMATION SAE Tap Drill Sizes Metric Tap Drill Sizes Decimal Equivalents ...
Page 12: ...NOTES GENERAL INFORMATION 1 12 ...
Page 48: ...3 2 ENGINE ENGINE SPECIFICATIONS Crankcase Exploded Views ...
Page 49: ...3 3 ENGINE 3 Oil Pump Water Pump Engine Cover Exploded View ...
Page 50: ...3 4 ENGINE Stator Cover Starter Water Pump Oil Filter Pressure Relief Exploded View ...
Page 51: ...3 5 ENGINE 3 Cylinder Cylinder Head Piston Exploded View ...
Page 140: ...4 32 ELECTRONIC FUEL INJECTION Fuel Injector PTO Circuit Fuel Injector MAG Circuit ...
Page 143: ...4 35 ELECTRONIC FUEL INJECTION 4 Throttle Position Sensor TPS Circuit Fuel Pump Circuit ...
Page 144: ...NOTES ELECTRONIC FUEL INJECTION 4 36 ...
Page 182: ...NOTES BODY STEERING SUSPENSION 5 38 ...
Page 311: ...10 17 ELECTRICAL 10 COOLING SYSTEM SCHEMATIC Cooling System Break Out Diagram ...
Page 327: ...10 33 ELECTRICAL 10 Instrument Cluster Circuit Transmission Switch Circuit ...
Page 328: ...10 34 ELECTRICAL Wheel Speed Sensor Circuit AWD Circuit ...
Page 329: ...10 35 ELECTRICAL 10 Fuel Gauge Display Circuit Cooling Fan Circuit ...
Page 330: ...10 36 ELECTRICAL Charging System Circuit ...
Page 331: ...WD 1 WIRE DIAGRAM 2009 RANGER RZR RZR S PAGE 1 OF 2 ...
Page 332: ...WD 2 WIRE DIAGRAM 2009 RANGER RZR RZR S PAGE 2 OF 2 ...