2001 Jaguar XJR Engine knocking

2001 JAGUAR XJR
106,000 MILES • V8 • 2WD • AUTOMATIC
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RSMITH
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  • 1 POST
When you start the car in the morning, (or after sitting) when the car drops to idle, there is a very pronounced knocking noise that goes away (or is less) after warming up or driving. Seem to be worse when it's cold.
Now the check engine light has just come on with a restricted performance initially (then goes off) then after a few starts the check engine light goes off. This has happened 3 times.

Any ideas???
Oct 26, 2009 at 11:28 AM
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DOCFIXIT
  • ✓ASE Certified Mechanic
  • 18,828 POSTS
  • ASE Certified Mechanic
Hi
Have computer checked for codes then post will advise. Knocking is probably activating knock sensor
Oct 26, 2009 at 1:01 PM
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