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Home >> Jaguar >> 2012 >> XKR 2D Coupe >> Repair and Diagnosis >> External Pages >> Different car >> Section 94 (Fuel Charging & Controls - V8 N/A 5.0L Petrol -- XK/X150) >> Fuel Charging And Controls - V8 N/A 5.0L Petrol >> Diagnosis And Testing >> Symptom Chart

Symptom Chart

WARNING: This page is about a different car, the 2015 Jaguar XK, 2014 Jaguar XK, 2013 Jaguar XK, and 2012 Jaguar XK. However, it is still accessible from the selected car via links, so may be relevant.
SYMPTOM POSSIBLE CAUSES ACTION
Engine cranks, but does not fire
  • Engine breather system disconnected/restricted
  • Ignition system
  • Fuel system
  • Electronic engine control
 Ensure the engine breather system is free from restriction and is correctly installed. Check for ignition system, fuel system and electronic engine control DTCs and refer to Diagnostic Trouble Code (DTC) Index - DTC: Engine Control Module (PCM) 5.0L NA V8 - AJ133 .
Engine cranks and fires, but will not start
  • Evaporative emissions purge valve
  • Fuel pump
  • Spark plugs
  • HT short to ground (tracking) check rubber boots for cracks/damage
  • Ignition system
 Check for evaporative emissions, fuel system and ignition system related DTCs and refer to:Diagnostic Trouble Code (DTC) Index - DTC: Engine Control Module (PCM) 5.0L NA V8 - AJ133 .
Difficult cold start
  • Engine coolant level/antifreeze content
  • Battery
  • Electronic engine controls
  • Exhaust Gas Recirculation (EGR) valve stuck open
  • Fuel pump
  • Purge valve
 Check the engine coolant level and condition. Ensure the battery is in a fully charged and serviceable condition. Check for electronic engine controls, engine emissions, fuel system and evaporative emissions system related DTCs and refer to Diagnostic Trouble Code (DTC) Index - DTC: Engine Control Module (PCM) 5.0L NA V8 - AJ133 .
Difficult hot start
  • Injector leak
  • Electronic engine control
  • Purge valve
  • Fuel pump
  • Ignition system
  • EGR valve stuck open
 Check for injector leak, install new injector as required. Check for electronic engine controls, evaporative emissions, fuel system, ignition system and engine emission system related DTCs and refer to Diagnostic Trouble Code (DTC) Index - DTC: Engine Control Module (PCM) 5.0L NA V8 - AJ133 .
Difficult to start after hot soak (vehicle standing, engine off, after engine has reached operating temperature)
  • Injector leak
  • Electronic engine control
  • Purge valve
  • Fuel pump
  • Ignition system
  • EGR valve stuck open
 Check for injector leak, install new injector as required. Check for electronic engine controls, evaporative emissions, fuel system, ignition system and engine emission system related DTCs and refer to: Diagnostic Trouble Code (DTC) Index - DTC: Engine Control Module (PCM) 5.0L NA V8 - AJ133 .
Engine stalls soon after start
  • Breather system disconnected/restricted
  • ECM relay
  • Electronic engine control
  • Ignition system
  • Air intake system restricted
  • Air leakage
  • Fuel lines
 Ensure the engine breather system is free from restriction and is correctly installed. Check for electronic engine control, ignition system and fuel system related DTCs and refer to: Diagnostic Trouble Code (DTC) Index - DTC: Engine Control Module (PCM) 5.0L NA V8 - AJ133 .Check for blockage in air filter element and air intake system. Check for air leakage in air intake system
Engine hesitates/poor acceleration
  • Fuel pressure, fuel pump, fuel lines
  • Injector leak
  • Air leakage
  • Electronic engine control
  • Throttle motor
  • Restricted accelerator pedal travel (carpet, etc)
  • Ignition system
  • EGR valve stuck open
  • Transmission malfunction
 Check for fuel system related DTCs and refer to:Diagnostic Trouble Code (DTC) Index - DTC: Engine Control Module (PCM) 5.0L NA V8 - AJ133 . Check for injector leak, install new injector as required. Check for air leakage in air intake system. Ensure accelerator pedal is free from restriction. Check for electronic engine controls, ignition, engine emission system and transmission related DTCs and refer to the relevant DTC Index
Engine backfires
  • Fuel pump/lines
  • Air leakage
  • Electronic engine controls
  • Ignition system
  • Sticking variable camshaft timing (VCT) hub
 Check for fuel system failures. Check for air leakage in intake air system. Check for electronic engine controls, ignition system and VCT system related DTCs and refer to: Diagnostic Trouble Code (DTC) Index - DTC: Engine Control Module (PCM) 5.0L NA V8 - AJ133 .
Engine surges
  • Fuel pump/lines
  • Electronic engine controls
  • Throttle motor
  • Ignition system
 Check for fuel system failures. Check for electronic engine controls, throttle system and ignition system related DTCs and refer to:Diagnostic Trouble Code (DTC) Index - DTC: Engine Control Module (PCM) 5.0L NA V8 - AJ133 .
Engine detonates/knocks
  • Fuel pump/lines
  • Air leakage
  • Electronic engine controls
  • Sticking VCT hub
 Check for fuel system failures. Check for air leakage in intake air system. Check for electronic engine controls and VCT system related DTCs and refer to Diagnostic Trouble Code (DTC) Index - DTC: Engine Control Module (PCM) 5.0L NA V8 - AJ133 .
No throttle response
  • Electronic engine controls
  • Throttle motor
 Check for electronic engine controls and throttle system related DTCs and refer to:Diagnostic Trouble Code (DTC) Index - DTC: Engine Control Module (PCM) 5.0L NA V8 - AJ133 .
Poor throttle response
  • Breather system disconnected/restricted
  • Electronic engine control
  • Transmission malfunction
  • Traction control event
  • Air leakage
 Ensure the engine breather system is free from restriction and is correctly installed. Check for electronic engine controls, transmission and traction control related DTCs and refer to:Diagnostic Trouble Code (DTC) Index - DTC: Engine Control Module (PCM) 5.0L NA V8 - AJ133 . Check for air leakage in intake air system
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