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GENERAL INFORMATION
TROUBLE SHOOTING
* PLEASE READ THIS FIRST *
ENGINE PERFORMANCE
TUNE-UP TROUBLE SHOOTING
NOTE: This article is generic in nature and all information does not apply to all
vehicles. For vehicle specific information, see the appropriate articles in the
ENGINE PERFORMANCE category.
NOTE: This article is generic in nature and all information does not apply to all
vehicles. For vehicle specific information, see the appropriate articles in the
ENGINE PERFORMANCE category.
Problem & Possible Cause Action
Carbon Fouled Plugs
Clogged Air Filter Replace Air Filter
Incorrect Idle Speed Reset Idle Speed
Faulty Ignition Wiring Replace Ignition
Wiring
Sticky Valves/Worn Valve Seal Check Valve Train
Fuel Injection Operation Check Fuel Injection
Wet/Oil Fouled Plugs
Worn Rings/Pistons Overhaul/Replace
Engine
Excessive Cylinder Wear Overhaul/Replace
Engine
Plug Gap Bridged
Combustion Chamber Carbon Deposits Clean Combustion
Chamber
Blistered Electrode
Engine Overheating Check Cooling System
Loose Spark Plugs Clean/Torque Plugs
Over-Advanced Timing Reset Timing
Wrong Plug Heat Range Install Correct Plug
Melted Electrodes
Incorrect Timing Reset Timing
Burned Valves Replace Valves
Engine Overheating Check Cooling System
Wrong Plug Heat Range Install Correct Plug
Engine Won't Start
Loose Connections Check Connections
2015 Porsche Cayenne
GENERAL INFORMATION TROUBLE SHOOTING
2019年11月18日 11:42:3418 Page 1 © 2011 Mitchell Repair Information Company, LLC.
No Power Check Fuses/Battery
Loose/Worn Timing Belt/Chain/Gears Check Belt/Chain/Gears
Engine Runs Rough
Leaky/Clogged Fuel Injectors Repair Fuel Injectors
Leaky/Clogged Fuel Lines Repair Fuel Lines
Clogged Fuel Filter Replace Fuel Filter
Incorrect Timing Reset Timing/Check
Advance
Faulty Plugs/Wires Replace Plugs/Wires
Uneven Compression Overhaul/Replace
Engine
Poor Acceleration
Incorrect Ignition Timing Reset Timing
Leaky Valves Check Compression
Component Failure
Spark Arcing Replace Faulty Part
Defective Pick-Up Coil Replace Pick-Up Coil
Defective Ignition Coil Replace Ignition Coil
Defective Control Unit Replace Control Unit
Ignition Diagnosis By Scope Pattern
All Firing Lines Abnormally High
Retarded Ignition Timing Reset Ignition
Timing
Lean Air/Fuel Mixture Adjust Fuel Mixture
High Secondary Resistance Repair Secondary
Ignition
All Firing Lines Abnormally Low
Rich Air/Fuel Mixture Adjust Air/Fuel
Mixture
Arcing Coil Wire Replace Coil Wire
Cracked Coil Replace Coil
Low Coil Output Replace Coil
Low Compression Check/Repair Engine
Several High Firing Lines
Fuel Mixture Unbalanced Check Fuel System
EGR Valve Stuck Open Clean/Replace EGR
Valve
High Plug Wire Resistance Replace Plug Wire
Cracked/Broken Plugs Replace Plugs
Intake Vacuum Leak Repair Leak
Several Low Firing Lines
Fuel Mixture Unbalanced Adjust Fuel Mixture
Plug Wires Arcing Replace Plug Wires
Cracked Coil Arcing Replace Coil
2015 Porsche Cayenne
GENERAL INFORMATION TROUBLE SHOOTING
2019年11月18日 11:42:38 Page 2 © 2011 Mitchell Repair Information Company, LLC.
FUEL INJECTION TROUBLE SHOOTING
Uneven Compression Check/Repair Engine
Faulty Spark Plugs Replace Plugs
Cylinders Not Firing
Cracked Distributor Cap Replace Cap
Shorted Plug Wires Replace Plug Wires
Mechanical Engine Fault Check/Repair Engine
Spark Plugs Fouled Replace Plugs
Carbon Track in Distributor Cap Replace Cap
Hard Starting
Defective Ignition Coil(s) Replace Coil(s)
Fouled Spark Plugs Replace Plugs
Incorrect Timing Reset Ignition Timing
NOTE: This article is generic in nature and all information does not apply to all
vehicles. For vehicle specific information, see the appropriate articles in the
ENGINE PERFORMANCE category.
Problem & Possible Cause Action
Cold Start Valve Inoperative Test Cold Start Valve
Poor Vacuum/Electrical Connection Repair Connections
Contaminated Fuel Test Fuel for
Water/Alcohol
Bad Fuel Pump Relay/Circuit Test Relay/Wiring
Battery Voltage Low Charge/Test Battery
Low Fuel Pressure Test Press.
Regulator/Pump
No Distributor Reference Pulse Repair Ignition System
Coolant Temp. Sensor Defective Test Temp.
Sensor/Circuit
No Power To Injectors Check Injector
Fuse/Relay
Hard Starting
Defective Idle Air Control (IAC) Test IAC and Circuit
EGR Valve Open Test EGR Valve/Control
Circuit
Restricted Fuel Lines Inspect/Replace Fuel
Lines
Poor MAP Sensor Signal Test MAP
Sensor/Circuit
Engine Stalls During Parking Maneuver Check P.S. Press.
Switch
Rough Idle
Dirty Fuel Injectors Clean/Replace
Injectors
2015 Porsche Cayenne
GENERAL INFORMATION TROUBLE SHOOTING
2019年11月18日 11:42:38 Page 3 © 2011 Mitchell Repair Information Company, LLC.
Poor MAP Sensor Signal Test MAP
Sensor/Circuit
Intermittent Fuel Injector Operation Check Harness
Connectors
Erratic Vehicle Speed Sensor Inputs Harness Too Close to
Plug Wires
Poor O2 Sensor Signal Test O2 Sensor/Circuit
Faulty PCV System Check PCV Valve and
Hoses
Poor Acceleration
Weak Fuel Pump Replace Fuel Pump
Dirty Fuel Injectors Clean/Replace
Injectors
Excessive Intake Valve Deposits Clean Intake System
Poor High Speed Operation
Low Fuel Pump Volume Faulty Fuel
Pump/Filter
Poor MAP Sensor Signal Test Speed
Sensor/Circuit
Acceleration Ping/Knock
Faulty EGR System Check EGR Valve and
Hoses
Poor Knock Sensor Signal Test Knock
Sensor/Circuit
Poor Baro Sensor Signal Test Baro
Sensor/Circuit
Improper Ignition Timing Adjust Timing
Engine Overheating Check Cooling System
Poor Quality Fuel Use Different Fuel
Carbon Build-Up Decarbon Engine
2015 Porsche Cayenne
GENERAL INFORMATION TROUBLE SHOOTING
2019年11月18日 11:42:38 Page 4 © 2011 Mitchell Repair Information Company, LLC.
GENERAL INFORMATION
TROUBLE SHOOTING
* PLEASE READ THIS FIRST *
ENGINE PERFORMANCE
TUNE-UP TROUBLE SHOOTING
NOTE: This article is generic in nature and all information does not apply to all
vehicles. For vehicle specific information, see the appropriate articles in the
ENGINE PERFORMANCE category.
NOTE: This article is generic in nature and all information does not apply to all
vehicles. For vehicle specific information, see the appropriate articles in the
ENGINE PERFORMANCE category.
Problem & Possible Cause Action
Carbon Fouled Plugs
Clogged Air Filter Replace Air Filter
Incorrect Idle Speed Reset Idle Speed
Faulty Ignition Wiring Replace Ignition
Wiring
Sticky Valves/Worn Valve Seal Check Valve Train
Fuel Injection Operation Check Fuel Injection
Wet/Oil Fouled Plugs
Worn Rings/Pistons Overhaul/Replace
Engine
Excessive Cylinder Wear Overhaul/Replace
Engine
Plug Gap Bridged
Combustion Chamber Carbon Deposits Clean Combustion
Chamber
Blistered Electrode
Engine Overheating Check Cooling System
Loose Spark Plugs Clean/Torque Plugs
Over-Advanced Timing Reset Timing
Wrong Plug Heat Range Install Correct Plug
Melted Electrodes
Incorrect Timing Reset Timing
Burned Valves Replace Valves
Engine Overheating Check Cooling System
Wrong Plug Heat Range Install Correct Plug
Engine Won't Start
Loose Connections Check Connections
2015 Porsche Cayenne
GENERAL INFORMATION TROUBLE SHOOTING
2019年11月18日 11:42:3418 Page 1 © 2011 Mitchell Repair Information Company, LLC.
No Power Check Fuses/Battery
Loose/Worn Timing Belt/Chain/Gears Check Belt/Chain/Gears
Engine Runs Rough
Leaky/Clogged Fuel Injectors Repair Fuel Injectors
Leaky/Clogged Fuel Lines Repair Fuel Lines
Clogged Fuel Filter Replace Fuel Filter
Incorrect Timing Reset Timing/Check
Advance
Faulty Plugs/Wires Replace Plugs/Wires
Uneven Compression Overhaul/Replace
Engine
Poor Acceleration
Incorrect Ignition Timing Reset Timing
Leaky Valves Check Compression
Component Failure
Spark Arcing Replace Faulty Part
Defective Pick-Up Coil Replace Pick-Up Coil
Defective Ignition Coil Replace Ignition Coil
Defective Control Unit Replace Control Unit
Ignition Diagnosis By Scope Pattern
All Firing Lines Abnormally High
Retarded Ignition Timing Reset Ignition
Timing
Lean Air/Fuel Mixture Adjust Fuel Mixture
High Secondary Resistance Repair Secondary
Ignition
All Firing Lines Abnormally Low
Rich Air/Fuel Mixture Adjust Air/Fuel
Mixture
Arcing Coil Wire Replace Coil Wire
Cracked Coil Replace Coil
Low Coil Output Replace Coil
Low Compression Check/Repair Engine
Several High Firing Lines
Fuel Mixture Unbalanced Check Fuel System
EGR Valve Stuck Open Clean/Replace EGR
Valve
High Plug Wire Resistance Replace Plug Wire
Cracked/Broken Plugs Replace Plugs
Intake Vacuum Leak Repair Leak
Several Low Firing Lines
Fuel Mixture Unbalanced Adjust Fuel Mixture
Plug Wires Arcing Replace Plug Wires
Cracked Coil Arcing Replace Coil
2015 Porsche Cayenne
GENERAL INFORMATION TROUBLE SHOOTING
2019年11月18日 11:42:38 Page 2 © 2011 Mitchell Repair Information Company, LLC.
FUEL INJECTION TROUBLE SHOOTING
Uneven Compression Check/Repair Engine
Faulty Spark Plugs Replace Plugs
Cylinders Not Firing
Cracked Distributor Cap Replace Cap
Shorted Plug Wires Replace Plug Wires
Mechanical Engine Fault Check/Repair Engine
Spark Plugs Fouled Replace Plugs
Carbon Track in Distributor Cap Replace Cap
Hard Starting
Defective Ignition Coil(s) Replace Coil(s)
Fouled Spark Plugs Replace Plugs
Incorrect Timing Reset Ignition Timing
NOTE: This article is generic in nature and all information does not apply to all
vehicles. For vehicle specific information, see the appropriate articles in the
ENGINE PERFORMANCE category.
Problem & Possible Cause Action
Cold Start Valve Inoperative Test Cold Start Valve
Poor Vacuum/Electrical Connection Repair Connections
Contaminated Fuel Test Fuel for
Water/Alcohol
Bad Fuel Pump Relay/Circuit Test Relay/Wiring
Battery Voltage Low Charge/Test Battery
Low Fuel Pressure Test Press.
Regulator/Pump
No Distributor Reference Pulse Repair Ignition System
Coolant Temp. Sensor Defective Test Temp.
Sensor/Circuit
No Power To Injectors Check Injector
Fuse/Relay
Hard Starting
Defective Idle Air Control (IAC) Test IAC and Circuit
EGR Valve Open Test EGR Valve/Control
Circuit
Restricted Fuel Lines Inspect/Replace Fuel
Lines
Poor MAP Sensor Signal Test MAP
Sensor/Circuit
Engine Stalls During Parking Maneuver Check P.S. Press.
Switch
Rough Idle
Dirty Fuel Injectors Clean/Replace
Injectors
2015 Porsche Cayenne
GENERAL INFORMATION TROUBLE SHOOTING
2019年11月18日 11:42:38 Page 3 © 2011 Mitchell Repair Information Company, LLC.
Poor MAP Sensor Signal Test MAP
Sensor/Circuit
Intermittent Fuel Injector Operation Check Harness
Connectors
Erratic Vehicle Speed Sensor Inputs Harness Too Close to
Plug Wires
Poor O2 Sensor Signal Test O2 Sensor/Circuit
Faulty PCV System Check PCV Valve and
Hoses
Poor Acceleration
Weak Fuel Pump Replace Fuel Pump
Dirty Fuel Injectors Clean/Replace
Injectors
Excessive Intake Valve Deposits Clean Intake System
Poor High Speed Operation
Low Fuel Pump Volume Faulty Fuel
Pump/Filter
Poor MAP Sensor Signal Test Speed
Sensor/Circuit
Acceleration Ping/Knock
Faulty EGR System Check EGR Valve and
Hoses
Poor Knock Sensor Signal Test Knock
Sensor/Circuit
Poor Baro Sensor Signal Test Baro
Sensor/Circuit
Improper Ignition Timing Adjust Timing
Engine Overheating Check Cooling System
Poor Quality Fuel Use Different Fuel
Carbon Build-Up Decarbon Engine
2015 Porsche Cayenne
GENERAL INFORMATION TROUBLE SHOOTING
2019年11月18日 11:42:38 Page 4 © 2011 Mitchell Repair Information Company, LLC.