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International Automotive Technicians Network
2004 Jaguar XJR 4.2L Excessive knocking
Posted to European Driveability on 2/17/2010 2 Replies

Vehicle has a very loud knocking noise only under acceleration (heavy acceleration). It sounds like detonation (the "marbles in cylinder" sound), but it is very pronounced. So much so we initially thought it was a mechanical problem.

We put "ears" on the bell...

2 Replies Received (View Replies)

  Related Documents & Media  2004 Jaguar XJR

 
Message Closed w/FIX

car Vehicle Data

2004 Jaguar XJR

VIN SAJWA73B74
Engine4.2 L / 8 cyl / GAS
Trans6-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsExcessive Knocking
OccursUnder Load

Trouble Codes

P0300Multiple Misfire Detected
P0302Cylinder 2 Misfire Detected
P0304Cylinder 4 Misfire Detected
P0306Cylinder 6 Misfire Detected
Message Closed w/FIX

car Vehicle Data

2004 Jaguar XJR

VIN SAJWA73B74
Engine4.2 L / 8 cyl / GAS
Trans6-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsExcessive Knocking
OccursUnder Load

Trouble Codes

P0300Multiple Misfire Detected
P0302Cylinder 2 Misfire Detected
P0304Cylinder 4 Misfire Detected
P0306Cylinder 6 Misfire Detected