Table of Contents
Related Manuals for Daewoo G420E
Summary of Contents for Daewoo G420E
- Page 1 SB4136E00 Jun. 2004 Service Manual G420E/G424E Tier LP Engine Lift Trucks G15S-2, G18S-2, G20SC-2 GC15S-2, GC18S-2, GC20SC-2 With G420E Tier LP Engine G20E-3, G25E-3, G30E-3, G32E-3 GC20E-3, GC25E-3, GC30E-3, GC32E-3 with G424E Tier LP Engine...
-
Page 2: Important Safety Information
If a tool, procedure, work method or operating technique not specifically recommended by DAEWOO is used, you must satisfy yourself that it is safe for you and others. You should also ensure that the product will not be damaged or made unsafe by the operation, lubrication, maintenance or repair procedures you choose. - Page 4 * This manual shows just LP fuel and engine control system for TIER- LP engine, so regarding other ares(basic engine), please refer to the separate manual of SB4008E for G420 and SB2215E for G424. Tier G420E/G424E LP Engine Table of Contents...
-
Page 6: Table Of Contents
CHAPTER 1 ENGINE SPECIFICATION Fuel Trim Valve Inspection (FTV) ......33 Inspect Air/Fuel Valve Mixer Assembly.....33 Indication of Engine Serial Number......12 Inspect for Intake Leaks ...........34 Specifications(G420E) ..........13 Inspect Throttle Assembly ........34 Specifications(G424E) ..........14 Checking the TMAP Sensor ........34 Inspect Engine for Exhaust Leaks......34 Replace Oxygen Sensor ..........34... - Page 7 N2001 Service Testing ..........78 Primary Stage Test Hardware ........79 Primary Stage Pressure Test........79 N-CA55-500TR Service AVV (Air Valve Vacuum) Testing..............81 Ignition Timing Adjustment ........82 Idle Mixture Adjustment..........85 CHAPTER 10 SERVICE TOOL KIT Service Tool Kit ............87 Tier G420E/G424E LP Engine Table of Contents...
-
Page 8: Working With Lpg Equipment
Tier G420E/G424E LP Engine Working with LPG Equipment... -
Page 9: Chapter 0 Lpg And Lpg Fuel Tanks
Tier G420E/G424E LP Engine LPG and LPG Fuel Tanks... -
Page 10: Lpg Fuel Tanks
It must also be replaced if the foot ring is bent to the point where the tank will not stand or is easily knocked over. Tier G420E/G424E LP Engine LPG and LPG Fuel Tanks... -
Page 11: Lpg Fuel Tank Components
Typically a warning label surrounds the atmosphere. fixed tube gauge which reads STOP FILLING WHEN LIQUID APPEARS. Tier G420E/G424E LP Engine LPG and LPG Fuel Tanks... -
Page 12: Quick Disconnect Coupling
Weakness Ring Figure 9 Figure 8 Tier G420E/G424E LP Engine MI-04 System Overview... -
Page 13: Chapter 1 Engine Specification
CHAPTER 1 ENGINE SPECIFICATION Indication of Engine Serial Number Tier G420E/G424E LP Engine Engine Specification... -
Page 14: Specifications(G420E)
Specifications(G420E) GENERAL DESCRIPTION ENGINE TYPE: Water-cooled, Inline 4-Cycle, 4-Cylinders Naturally Aspirated 1-Venturi Intake Manifold COMBUSTION SYSTEM: Semi-spherical Combustion chamber EXHAUST SYSTEM: Cast Iron, Dry VALVE CONFIGURATION: OHC, 2 Valves per Cylinder DISPLACEMENT: 1,997 cc (122 CID) BORE: 85 mm (3.35 in.) STROKE: 88 mm (3.46 in.) -
Page 15: Specifications(G424E)
Throttle Position Sensor (built in Throttle Body) THROTTLE BODY: Electronic Throttle Body FUEL TRIM VALVE (FTV): 12 V operation volt LP FUEL LOCK-OFF: 12 V operation volt, ON/OFF Control by ECM EXHAUST SYSTEM CATALYTIC MUFFLER: Three-way Catalyst included Tier G420E/G424E LP Engine Engine Specification... -
Page 16: Chapter 2 Mi-04 Lpg System Operational Overview
Fuel Lock Main Accel Pedal Relay Converter Vacuum Line Air Cleaner Fuel Trim Valve Coolant Line Mixer DBW Throttle SECM TMAP Oxygen Engine Distributor Catalytic Muffler VR Sensor Coolant Temp Sensor Figure 10 Tier G420E/G424E LP Engine System Operational Overview... - Page 17 Small Engine TMAP Control Sensor Module (SECM) Acceleration pedal Angle Oxygen Fuel Trim Sensor Smart Coil Sensor Valve Fuel Electronic Catalytic Engine Lock-Off Converter Mixer Throttle Muffler G420E/G424E Closed Loop LP Fuel System Tier G420E/G424E LP Engine System Operational Overview...
-
Page 18: Mi-04 Lp Fuel Filter
RPM. When an operator turns on the key switch the lock-off is opened but if the operator fails to crank the engine, the SECM will close the lock-off after 5 seconds. Tier G420E/G424E LP Engine System Operational Overview... -
Page 19: N-2001 Regulator/Converter
To replace heat lost to vaporization, engine coolant is supplied by the engine driven water pump and pumped through the regulator. Heat provided by this coolant is transferred through to the fuel vaporization chamber. Tier G420E/G424E LP Engine System Operational Overview... -
Page 20: N-2001 Theory Of Operation
To open the secondary valve a negative pressure signal must be received from the air/fuel mixer. When the engine is cranking or running a negative pressure Tier G420E/G424E LP Engine System Operational Overview... -
Page 21: Mi-04 N-Ca55-500Tr Mixer
The check valve plate seals off the bottom of the air valve vacuum (AVV) chamber and the air valve sealing ring seals the top portion of the AVV chamber as the piston moves against the air valve spring. Tier G420E/G424E LP Engine System Operational Overview... - Page 22 If a reverse pressure pulse, caused by engine reversion, travels up the intake manifold toward the mixer it will close the check valve for the duration of the pulse, preventing the pulse from entering the AVV chamber. Tier G420E/G424E LP Engine System Operational Overview...
-
Page 23: Mi-04 Electronic Throttle
(TPS) (Figure in the SECM. 21). Throttle Plate Gear Drive DC Drive Motor Bosch 32mm Electronic Throttle Body DV-E5 Figure 21 Picture courtesy of Robert Bosch GmbH Tier G420E/G424E LP Engine System Operational Overview... -
Page 24: Mi-04 Fuel Trim Valve
If the pressure on the atmospheric side of the N2001 secondary diaphragm is reduced, the diaphragm will close the secondary valve until a balance condition exists across the diaphragm, reducing fuel flow and leaning the air/fuel mixture. Tier G420E/G424E LP Engine System Operational Overview... -
Page 25: Heated Exhaust Gas Oxygen Sensor (Hego)
600 deg. F., a heated element is added to the sensor housing. Two wires provide the necessary 12VDC and ground signal for the heater element. A fourth wire provides an independent ground for the sensor. Tier G420E/G424E LP Engine System Operational Overview... -
Page 26: Secm (General Description)
(VCC) to the Smart Coil enriches the air/fuel mixture. Control is achieved by Driver, transducer ground for the all sensors, and a modulating the fuel trim low side driver signal controlling the fuel lock-off, MIL and FTV. Tier G420E/G424E LP Engine System Operational Overview... -
Page 27: Catalytic Muffler
CO. promote oxygen storage and improve oxidation efficiency. Oxidation and Reduction Process Reduction: NOx, CO > N2 + CO2 Oxidation: HC, CO, O2 > H2O + CO2 3-Way Catalytic Muffler Figure 25 Tier G420E/G424E LP Engine System Operational Overview... -
Page 28: Secm (Load/Speed Management)
A Throttle Position Sensor (TPS), (Figure 27) which is integral to the Drive By Wire (DBW) throttle assembly, provides feedback for position control by monitoring the exact position of the throttle valve. Tier G420E/G424E LP Engine System Operational Overview... - Page 29 SECM to achieve the appropriate motor-current response then passed to the throttle. The throttle moves to the commanded position and provides a feedback signal from the throttle position sensor (TPS) to the SECM. Tier G420E/G424E LP Engine System Operational Overview...
-
Page 30: Mi-04 Ignition Management
A Variable Reluctance sensor (Figure 31) is an mechanical advance system internally. But the new electromagnetic device consisting of a permanent distributor of G420E/G424E engine has no internal magnet surrounded by a winding of wire. The sensor advance mechanisms. is used in conjunction with a ferrous timing wheel located on the crankshaft pulley. -
Page 31: Chapter 3 Mi- 04 Maintenance Schedule
TMAP sensor, O2 sensor, Electronic throttle, Repeat leak inspection as listed above. Control Relays, Fuel Trim Valve, Acceleration Repair any fuel leaks before continuing. Pedal, and Distributor sensor. Repair and/or replace as necessary. Tier G420E/G424E LP Engine Maintenance Schedule... -
Page 32: Inspect Acceleration Pedal Operation
Apply anti-seize compound to the spark plug threads and install. Spark plug tightening torque : 25 N•m (18 lb•ft) CAUTION DO NOT OVERTIGHTEN THE SPARK PLUGS. Re-install the high voltage cables. Tier G420E/G424E LP Engine Maintenance Schedule... -
Page 33: Replace Lp Fuel Filter Element
11. Crank the engine several revolutions to open the fuel lock-off. DO NOT START THE ENGINE. Turn the ignition key switch to the off position. 12. Check the filter housing, fuel lines and fittings for leaks. Repair as necessary. Tier G420E/G424E LP Engine Maintenance Schedule... -
Page 34: Testing Fuel Lock-Off Operation
(B) housing for coolant leaks. Refer to the pressure regulator/converter section of the service manual if maintenance is required. NOTE For pressure testing and internal inspection of the pressure regulator/converter, refer to the pressure regulator/converter section of the service manual. Tier G420E/G424E LP Engine Maintenance Schedule... -
Page 35: Inspect For Intake Leaks
Visually inspect the TMAP O-ring seal for damage. Replace as necessary. Apply a thin coat of an approved silicon lubricant to the TMAP o-ring seal. Re-install the TMAP sensor into the manifold adapter and securely tighten the retaining screw. Tier G420E/G424E LP Engine Maintenance Schedule... -
Page 36: Maintenance Schedule
Inspect regulator assembly for fuel/coolant leaks Fuel Trim Valve Section Inspect valve housing for wear, cracks or deterioration Ensure valve seals in the closed position when the engine is off Tier G420E/G424E LP Engine Maintenance Schedule... -
Page 37: Maintenance Schedule Continued
Inspect throttle assembly Inspect air filter Replace air filter element Check TMAP sensor for tightness and leaks Exhaust & Emission Section Inspect engine for exhaust leaks Replace Oxygen Sensor Replace PCV Valve and breather element Tier G420E/G424E LP Engine Maintenance Schedule... -
Page 38: Chapter 4 Mi-04 Lp Basic Troubleshooting
Fuel Lock-off malfunction Repair/replace Fuel Lock-off See Chapter 3 Fuel Lock-off Pressure regulator/converter Test pressure regulator/converter operation malfunction See Chapter 9 Tests and Adjustments Incorrect air/fuel or ignition/spark See Chapter 5 Advanced Diagnostics control Tier G420E/G424E LP Engine Basic Troubleshooting... - Page 39 Fill fuel container Do not exceed 80% of liquid capacity Air filter clogged Check air filter Clean/replace as required Incorrect air/fuel or ignition control See Chapter 5 Advanced Diagnostics Engine Mechanical See Engine Manufacturers Service Manual Tier G420E/G424E LP Engine Basic Troubleshooting...
- Page 40 Fill fuel container Accelerate/Hesita Do not exceed 80% of liquid capacity tion During Excess flow valve closed Reset excess flow valve Acceleration Close liquid valve Wait for a “click” sound Slowly open liquid valve Tier G420E/G424E LP Engine Basic Troubleshooting...
- Page 41 Remove obstruction from the fuel line Close liquid fuel valve Using caution, disconnect the fuel line (some propane may escape) Clear obstruction with compressed air Re-connect fuel line Slowly open liquid fuel valve & Leak test Tier G420E/G424E LP Engine Basic Troubleshooting...
- Page 42 Vacuum leak Check for vacuum leaks Between mixer and throttle body Between throttle body and intake manifold Between intake manifold and cylinder head Air/Fuel Mixer malfunction Check mixer See Chapter 8 Air/Fuel mixer section Tier G420E/G424E LP Engine Basic Troubleshooting...
- Page 43 See Chapter 8 Air/Fuel mixer section Restricted exhaust system Check exhaust system Measure exhaust back pressure Incorrect ignition control See Chapter 5 Advanced Diagnostics & Chapter 9 Tests and Adjustments Incorrect air/fuel control Incorrect throttle position Tier G420E/G424E LP Engine Basic Troubleshooting...
- Page 44 Weak ignition and/or spark control See Chapter 5 Advanced Diagnostics Incorrect air/fuel control See Chapter 5 Advanced Diagnostics Exhaust system leaks Repair exhaust system Oxygen sensor failure Replace as necessary See Chapter 5 Advanced Diagnostics Tier G420E/G424E LP Engine Basic Troubleshooting...
-
Page 45: Chapter 5 Mi-04 Lp Advanced Diagnostics
Since no other faults were stored there will be a long pause then one flash (1), pause, then two flashes (2). This identifies a twelve meaning the fault list will begin again. IB1O003L (1) Malfunction Indicator Lamp (MIL) for Engine control system Tier G420E/G424E LP Engine Advanced Diagnostics... -
Page 46: Displaying Fault Codes (Dfc) From Secm Memory
MIL ONLY: The MIL will light by an active low signal provided by the SECM, indicating a fault condition but no further action will take place. Tier G420E/G424E LP Engine Advanced Diagnostics... -
Page 47: Fault List Definitions
MAP signal, the TMAP has failed or the SECM traces. NOTE: The TPS is not a serviceable item and has failed. can only be repaired by replacing the DV-EV throttle assembly. Tier G420E/G424E LP Engine Advanced Diagnostics... - Page 48 OxygenSensorInputHigh: (Oxygen Sensor Input is 1 Sensor Range is Low) the APP1 potentiometer has High) malfunctioned. An improper APP1 reading may be due to dirt or oxidation on the sensor traces. OxygenSensorInputLow: (Oxygen Sensor Input is Low) Tier G420E/G424E LP Engine Advanced Diagnostics...
-
Page 49: Codes)
TPS1 sensor for an open circuit TPS1 signal disconnected or open circuit (Expected faults when ETC ETC PIN 6 to SECM PIN 17 connector is unplugged (SIGNAL) CODES: 22 & 24) ETC PIN 2 to SECM PIN 1 (GND) Tier G420E/G424E LP Engine Advanced Diagnostics... - Page 50 To check the TPS disconnect the throttle connector and measure the resistance (1.25KΩ +/-30%) from TPS PIN 2 (GND) to PIN 6 (TPS1 SIGNAL) TPS PIN 3 (PWR) to PIN 6 (TPS1 SIGNAL) *See Chapter 6.0 for sensor checks Tier G420E/G424E LP Engine Advanced Diagnostics...
- Page 51 If the fault really sets, then the engine will shut down. ETCSpringTestFailed Power Limit Perform throttle spring test by cycling the ignition key and re-check for fault Upon initial key-up the internal throttle return spring has become weak Tier G420E/G424E LP Engine Advanced Diagnostics...
- Page 52 Check the MAP sensor by disconnecting the TMAP connector and measuring at the sensor TMAP PIN 1(GND) to PIN 4 (PRESSURE SIGNAL KPA) (2.4kΩ - 8.2kΩ) TMAP PIN 3(PWR) to PIN 4 (PRESSURE SIGNAL KPA) (3.4kΩ - 8.2kΩ) Tier G420E/G424E LP Engine Advanced Diagnostics...
- Page 53 TMAP PIN 1 to SECM PIN 1 (GND) TMAP PIN 3 to SECM PIN 18 (XDCR +5VDC) To check the IAT sensor of the TMAP disconnect the TMAP connector and measure the IAT resistance *See the IAT table in Chapter 6.0 Tier G420E/G424E LP Engine Advanced Diagnostics...
- Page 54 Verify GND on COIL PIN D Verify +12vdc on COIL PIN E To check the Smart Coil internal circuit disconnect the coil connector and measure the resistance from pin to pin *See Smart Coil resistance check in Chapter 6.0 Tier G420E/G424E LP Engine Advanced Diagnostics...
- Page 55 Check battery voltage during starting and with the engine running to verify charging system and alternator function Measure battery power at the SECM with a multimeter SECM PIN 13 (BATT +) to SECM PIN 14 (BATT -) Tier G420E/G424E LP Engine Advanced Diagnostics...
- Page 56 SECM PIN 18 +5VDC to SECM PIN 1 XDCR GND Verify transducer power at ETC with a multimeter ETC PIN 3 XDCR PWR to ETC PIN 2 XDCR GND Verify transducer power to the Acceleration Pedal with a multimeter Tier G420E/G424E LP Engine Advanced Diagnostics...
- Page 57 Check Acceleration Pedal connector APP1 potentiometer malfunction. (MIL Only) Cycle the pedal several times Improper APP1 reading may be due and check APP1 signal at SECM to dirt or oxidation on the sensor PIN 15 traces Tier G420E/G424E LP Engine Advanced Diagnostics...
- Page 58 FTV PIN A (SIGNAL) TO PIN B (PWR) Check FTV for an open coil by disconnecting the FTV connector and measuring the resistance (~26Ω +/- 2Ω) FTV PIN A (SIGNAL) TO PIN B (PWR) Tier G420E/G424E LP Engine Advanced Diagnostics...
- Page 59 (~26Ω +/- 2Ω) FTV PIN A (SIGNAL) TO PIN B (PWR) Check N-CA55-500-TR mixer for heavy end build-up and operation (see mixer section) Check N2001 secondary for operation (see N2001 Regulator section) Tier G420E/G424E LP Engine Advanced Diagnostics...
- Page 60 O2 (SIGNAL) PIN B to SECM PIN 3 (AFRTrimValveLowerDC fault should also occur) Verify O2 sensor heater circuit is operating by measuring circuit resistance (2.1Ω +/-0.4Ω) O2 PIN C (HEATER GND) to PIN D (HEATER PWR) Tier G420E/G424E LP Engine Advanced Diagnostics...
-
Page 61: Chapter 6 Mi-04 Electrical Connections
CHAPTER 6 MI-04 ELECTRICAL CONNECTIONS Figure E1 Tier G420E/G424E LP Engine Electrical Connections... -
Page 62: Electrical Connections
120 OHM 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 APP2 APP1 +12VDC +12VDC MIL - +12VDC +12VDC +12VDC ELECTRONIC THROTTLE SMART COIL OXYGEN SENSOR TMAP SENSOR Figure E2 Tier G420E/G424E LP Engine Electrical Connections... -
Page 63: Resistance Checks
2.8KΩ AT 25 C (77 F) (COOLANT TEMPERATURE) (GND) +/- 8 C SENSOR POINT TO POINT EXPECTED RANGE O2 PIN C (HEATER GND) TO PIN 2.1 +/- 0.4 ohms (OXYGEN SENSOR) D (HEATER PWR) Tier G420E/G424E LP Engine N2001 Regulator/Converter... -
Page 64: Voltage Checks
1.4 +/- 0.15V AT FULL ACCEL Note: When you check the output voltage of acceleration pedal angle sensor, it must be connected to SECM so that SECM can supply 5V to the angle sensor. Tier G420E/G424E LP Engine N2001 Regulator/Converter... -
Page 65: Chapter 7 N2001 Pressure Regulator /Converter
Because of this it may perform disassemble, service or be necessary for the certified technician to replacement of the regulator/converter or disassemble, clean and service the mixer. regulator/converter after long periods of operation. Tier G420E/G424E LP Engine N2001 Regulator/Converter... -
Page 66: Hose Connections
D. 1/2” I.D. Hose -Breather E. 7/32” I.D. Vacuum Hose (10 inch recommended maximum length) F. 7/32” I.D. Vacuum Hose (11.5 inch recommended maximum length) G. 7/32” I.D. Vacuum Hose (18 inch recommended maximum length) Tier G420E/G424E LP Engine N2001 Regulator/Converter... -
Page 67: N2001 Removal Steps
Figure 24 (1) Fuel inlet line (2) Vacuum line (3) Fuel Lock-off (4) Cooling line (5) Fuel vapor outlet hose NOTE For installation of the N2001 reverse the removal steps. Tier G420E/G424E LP Engine N2001 Regulator/Converter... -
Page 68: N2001 Regulator Disassembly Steps
2. Remove the six primary diaphragm cover screws (4) and the primary cover assembly (5). Figure R6 4. Remove the primary diaphragm by sliding the diaphragm to one side, releasing the primary valve pin (Figure R6). Tier G420E/G424E LP Engine N2001 Regulator/Converter... - Page 69 (7), the primary valve (8) and the primary valve o-ring seal (9). The primary valve goes through the inlet plate, then through the body assembly and is retained by the primary diaphragm (Figure R9). Tier G420E/G424E LP Engine N2001 Regulator/Converter...
-
Page 70: N2001 Disassembled Service
4. Clean the regulator body (casting) with a parts cleaning solvent. Be sure to remove all seals and gaskets before cleaning the casting with solvent. 5. Make sure all parts (Figure R11) are completely dry before re-assembly. Tier G420E/G424E LP Engine N2001 Regulator/Converter... -
Page 71: Chapter 8 N-Ca55-500Tr Air/Fuel Mixer
Because of this it may replacement of the regulator/converter or be necessary for the certified technician to mixer. disassemble, clean and service the regulator/converter after long periods of operation. Tier G420E/G424E LP Engine N-CA55-500TR Mixer... -
Page 72: N-Ca55-500Tr Mixer Removal Steps
6. Remove the electronic throttle connector (Figure M1-4). 7. Remove the four bolts that mount the throttle adapter to the electronic throttle body (Figure M2- 8. Remove the mixer/adapter assembly from the throttle by gently pulling upwards. Tier G420E/G424E LP Engine N-CA55-500TR Mixer... -
Page 73: N-Ca55-500Tr Disassembly And Service
(5) ASSEMBLY (6) GASKET (7) GASKET (8) SCREW (9) WASHER (10) SCREW (11) ORIFICE FITTING (12) LABEL (13) LABEL (14) CAP Figure M6 3. Components of the N-CA55-500TR and the mixer body are shown in (Figure M6). Tier G420E/G424E LP Engine N-CA55-500TR Mixer... - Page 74 Install the throttle 6. Next, install the air valve spring (Figure M9). adapter tamper-resistant screws to the mixer (Figure M12). Tier G420E/G424E LP Engine N-CA55-500TR Mixer...
-
Page 75: N-Ca55-500Tr Disassembled Service
If this fitting is damaged the mixer will need to be replaced. Tier G420E/G424E LP Engine N-CA55-500TR Mixer... -
Page 76: Installing The Mixer/Throttle Assembly
2. Tighten the four tamper-proof retaining screws to from the air cleaner to be attached to the mixer air the specified torque (Figure M17). intake, along with the vent line from the engine PCV valve. Tier G420E/G424E LP Engine Test And Adjustments... - Page 77 Avoid pinching the O-ring in the cutaway TMAP sensor mounting holes. of the throttle adapter. This will damage the O-ring and cause a manifold leak in the system. Tier G420E/G424E LP Engine Test And Adjustments...
- Page 78 (Figure M20), then place the air horn adapter on top of the mixer with the intake tube facing the valve cover (air cleaner side of the engine). Tighten the air horn retaining bolts to specified torque values. Tier G420E/G424E LP Engine Test And Adjustments...
-
Page 79: Chapter 9 Test And Adjustments
(proportional to the leak size). An excessively rich air/fuel mixture can be caused by a secondary valve seat leak, repair as necessary (See Chapter 7 for disassembly of the N2001). Tier G420E/G424E LP Engine Test And Adjustments... -
Page 80: Primary Stage Test Hardware
¼” NPT hose barb fitting. 2. Connect a compressed air line (shop air ~100psi) to the liquid propane fuel inlet of the N2001 Regulator (Figure R12). Test Port Fule Inlet Figure R12 Tier G420E/G424E LP Engine Test And Adjustments... - Page 81 (See Chapter 7 for disassembly of the N2001). 7. Once the test is successful, re-install the primary test port plug and check the fittings for leaks (See Chapter 7 for installation of the N2001). Tier G420E/G424E LP Engine Test And Adjustments...
-
Page 82: N-Ca55-500Tr Service Avv (Air Valve Vacuum) Testing
FTV and the mixer to throttle adapter. 3. With the engine running at idle (700 RPM) the AVV should be between 5" and 10" water column. Gauge Fitting AVV Fitting Figure T1 Tier G420E/G424E LP Engine Test And Adjustments... -
Page 83: Ignition Timing Adjustment
(Figure G3). The internal VR sensor inside the distributor is not used by the SECM for a speed reference with the G420E/G424E engine and it’s wiring harness does not connect to the system. The distributors internal VR sensor is only used as an alignment reference point for setting the correct distributor position. - Page 84 WARNING Improper alignment of the distributor may cause system ignition problems resulting in ignition misfires or backfires. Tier G420E/G424E LP Engine Test And Adjustments...
- Page 85 SECM ignition control range at 15 Figure G7 degrees BTDC. 8. Rotate the crankshaft pulley so that one of the gear teeth on the timing wheel aligns in the center of the VR sensor (Figure G7). Tier G420E/G424E LP Engine Test And Adjustments...
-
Page 86: Idle Mixture Adjustment
USB port an appropriate USB Hub will need to be used). 3. Connect a timing light to the engine. 4. Turn the ignition key to the ON position (Do Not Start the Engine). Tier G420E/G424E LP Engine Test And Adjustments... - Page 87 Continue to do this until the FTV Duty Cycle reading is within the proper range (25-50%) 12. Turn the ignition key to the OFF position to shut down the engine. Tier G420E/G424E LP Engine Test And Adjustments...
-
Page 88: Chapter 10 Service Tool Kit
CHAPTER 10 SERVICE TOOL KIT A343079 USB (Universal Serial Bus) to CAN (Controller Area Network) Converter Assembly A343080 Service Tool Software (includes CD and Crypt Token (License Dongle)) Crypt Token A334071 Extension Cable Tier G420E/G424E LP Engine Service Tool Kit...