User Manuals: PleasureCraft Engine Group 8.1L Marine

Manuals and User Guides for PleasureCraft Engine Group 8.1L Marine. We have 1 PleasureCraft Engine Group 8.1L Marine manual available for free PDF download: Diagnostic Manual

PleasureCraft Engine Group 8.1L Diagnostic Manual

PleasureCraft Engine Group 8.1L Diagnostic Manual (337 pages)

MEFI 4 / 4B Series

Brand: PleasureCraft Engine Group | Category: Engine | Size: 3 MB

Table of Contents

Marine Electronic Fuel Injection (Mefi) Section 1 General Information

5
Marine Electronic Fuel Injection (Mefi) Section 2 Engine Control Module (Ecm) and Sensors

21
- General Description
  
  22
  - Computers and Voltage Signals
    22
  - Analog Signals
    22
    
    Three-Wire Sensors
    22
    
    Two-Wire Sensors
    22
  - Digital Signals
    23
    
    Switch Types
    23
    
    Pulse Counters
    23
  - Engine Control Module (ECM)
    24
    
    ECM Function
    24
    
    Memory
    24
    
    Rom
    24
    
    Ram
    24
    
    Eeprom
    24
  - Speed Density System
    25
    
    Speed
    25
    
    Density
    25
  - ECM Inputs and Sensor Descriptions
    25
  - Input Components
    25
  - Output Components
    25
    
    MEFI Inputs and Outputs
    26
    
    Engine Coolant Temperature (ECT) Sensor
    27
    
    Manifold Absolute Pressure (MAP) Sensor
    27
    
    Throttle Position (TP) Sensor
    28
    
    Intake Air Temperature (IAT) Sensor
    28
    
    Ignition Control (IC) Reference
    28
    
    Knock Sensor
    29
    
    Discrete Switch Inputs
    29
- Diagnosis
  
  30
  - Engine Control Module (ECM)
    30
- On-Board Service
  
  30
- Torque Speciﬁ Cations
  
  40
Marine Electronic Fuel Injection (Mefi) Section 3A Fuel Metering System - 5.0/5.7L

41
- General Description
  
  42
  - Purpose
    42
  - Modes of Operation
    42
    
    Starting Mode
    42
    
    Clear Flood Mode
    42
    
    Run Mode
    42
    
    Acceleration Mode
    42
    
    Fuel Cutoff Mode
    42
    
    Power Reduction Mode
    42
  - Fuel Metering System Components
    42
  - Fuel Pump Electrical Circuit
    44
  - Fuel Rail Assembly
    44
    
    Fuel Injectors
    44
    
    Pressure Regulator Assembly
    45
  - Throttle Body Assembly
    45
    
    Idle Air Control (IAC) Valve
    46
- Diagnosis
  
  46
- On-Board Service
  
  46
  - Fuel Control On-Board Service
    47
  - Fuel Pressure Relief Procedure
    47
  - Flame Arrestor
    47
  - Throttle Body Assembly
    48
  - Quick Connect Fitting(S) Service
    49
  - Fuel Rail Assembly
    51
  - Fuel Injectors
    53
  - Fuel Pressure Regulator Assembly
    54
  - Fuel Control Cell (FCC)
    55
  - Low-Pressure Fuel Pump
    58
Marine Electronic Fuel Injection (Mefi) Section 3B Fuel Metering System - 6.0L

61
- General Description
  
  62
  - Purpose
    62
  - Modes of Operation
    62
    
    Starting Mode
    62
    
    Clear Flood Mode
    62
    
    Run Mode
    62
    
    Acceleration Mode
    62
    
    Fuel Cutoff Mode
    62
    
    Power Reduction Mode
    62
  - Fuel Metering System Components
    62
  - Fuel Pump Electrical Circuit
    64
  - Fuel Rail Assembly
    64
    
    Fuel Injectors
    64
    
    Pressure Regulator Assembly
    65
  - Throttle Body Assembly
    65
    
    Idle Air Control (IAC) Valve
    66
- Diagnosis
  
  66
- On-Board Service
  
  66
  - Fuel Control On-Board Service
    67
  - Fuel Pressure Relief Procedure
    67
  - Flame Arrestor
    67
  - Throttle Body Assembly
    68
  - Quick Connect Fitting(S) Service
    69
  - Fuel Rail Assembly
    72
  - Fuel Control Cell (FCC)
    77
  - Fuel Pressure Regulator
    78
  - Fuel Pump Relay
    81
    
    Low-Pressure Fuel Pump
    81
- Torque Speciﬁ Cations
  
  82
Marine Electronic Fuel Injection (Mefi) Section 3C Fuel Metering System - 8.1L

83
- General Description
  
  84
  - Purpose
    84
  - Modes of Operation
    84
    
    Starting Mode
    84
    
    Clear Flood Mode
    84
    
    Run Mode
    84
    
    Acceleration Mode
    84
    
    Fuel Cutoff Mode
    84
    
    Power Reduction Mode
    84
  - Fuel Metering System Components
    84
  - Fuel Pump Electrical Circuit
    86
  - Fuel Rail Assembly
    86
    
    Fuel Injectors
    86
    
    Pressure Regulator Assembly
    87
  - Throttle Body Assembly
    87
    
    Idle Air Control (IAC) Valve
    88
- Diagnosis
  
  88
- On-Board Service
  
  88
  - Fuel Control On-Board Service
    89
  - Fuel Pressure Relief Procedure
    89
  - Flame Arrestor
    89
  - Throttle Body Assembly
    90
  - Quick Connect Fitting(S) Service
    91
  - Fuel Rail Assembly
    93
  - Fuel Control Cell (FCC)
    102
  - Low-Pressure Fuel Pump
    105
  - Fuel Pump Relay
    105
Marine Electronic Fuel Injection (Mefi 4) Section 4A Distributor Ignition (DI)

107
- Fastener Tightening Speciﬁ Cations
  108
- Ignition System Speciﬁ Cations
  108
- Distributor Ignition (DI) System Description
  109
- Engine Control Module (ECM)
  111
- Knock Sensor (KS) System Description
  112
  - Purpose
    112
  - Operation
    112
  - Normal Knock Signal
    112
  - Abnormal Knock Signal
    112
- Ignition Coil Replacement
  113
- Spark Plug Wire Replacement
  113
  - Spark Plug Wire Inspection
    114
- Spark Plug Replacement
  115
  - Spark Plug Usage
    115
  - Spark Plug Inspection
    115
  - Spark Plug Visual Inspection
    117
- Crankshaft Position (CKP) Sensor Replacement
  119
- Camshaft Position (CMP) Sensor Replacement
  120
- Setting Cam Retard
  121
- Knock Sensor (KS) Replacement
  122
Marine Electronic Fuel Injection (Mefi 4) Section 4B Electronic Ignition

123
- Fastener Tightening Speciﬁ Cations
  124
- Ignition System Speciﬁ Cations
  124
- Electronic Ignition (EI) System Description
  125
- Engine Control Module (ECM)
  127
- Knock Sensor (KS) System Description
  128
  - Purpose
    128
  - Operation
    128
  - Normal Knock Signal
    128
  - Abnormal Knock Signal
    128
- Ignition Coil(S) Replacement
  129
- Spark Plug Wire Replacement
  129
  - Spark Plug Wire Inspection
    130
- Spark Plug Replacement
  131
  - Spark Plug Usage
    131
  - Spark Plug Inspection
    131
  - Spark Plug Visual Inspection
    133
- Crankshaft Position (CKP) Sensor Replacement - 6.0L
  135
- Crankshaft Position (CKP) Sensor Replacement - 8.1L
  136
- Camshaft Position (CMP) Sensor Replacement - 6.0L
  137
- Camshaft Position (CMP) Sensor Replacement - 8.1L
  138
- Knock Sensors (KS) Replacement - 6.0L
  138
- Knock Sensor (KS) 1 Replacement - 8.1L
  140
- Knock Sensor (KS) 2 Replacement - 8.1L
  141
  - Engine Controls
    145
Marine Electronic Fuel Injection (Mefi) Section 7 Symptoms

297
- Hard Start
  299
- Symptoms
  299
- Visual/Physical Check
  299
- Surges And/Or Chuggles
  302
- Lack of Power, Sluggish or Spongy
  304
- Detonation/Spark Knock
  306
- Hesitation, Sag, Stumble
  308
- Cuts Out, Misses
  310
- Rough, Unstable or Incorrect Idle, Stalling
  312
- Fuel Injector Coil Test
  324
- Fuel Injector Balance Test
  326

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