XJ XJ6 / XJ8 / XJR ( X350 & X358 ) 2003 - 2009

vibration (resonance)

Old Feb 8, 2021 | 05:15 AM
  #1  
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Default vibration (resonance)

Good morning all,

There is a vibration (resonance) in the passenger compartment when the engine is in operation at a standstill or not between 1200 and 1400 rpm to be precise (so it does not come from the driveshaft, the axle and wheels) .
The Jag X350 from 2006 to 225000km, I thought that it could come from one of the 2 hydraulic engine mounts or that of the BVA.
What do you think ?

Otherwise I was also thinking of the Damper pulley ....

Are there systematic exchanges to be made on the side of these coins?

Thank you for your help.
Jeans

Bonjour à tous,

Il y a une vibration (résonance) dans l'habitacle lorsque le moteur est en fonctionnement à l'arrêt ou pas entre 1200 et 1400 tr/mn pour être précis ( donc cela ne vient pas de l'arbre de transmission, du pont et des roues) .
La Jag X350 de 2006 à 225000km, je pensais que cela pourrait provenir d'un des 2 supports moteur Hydrauliques ou celui de la BVA.
Qu'en pensez-vous ?

Sinon je pensais aussi à la poulie Damper....

Y-a-t-il des échanges systématiques à faire du côté de ces pièces ?

Merci de votre aide.
Jean
 
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Old Feb 15, 2021 | 08:09 AM
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What are your LTFTs? If you have a slightly leaky injector it may make idle rough but smooth out at higher RPM.
 
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Old Feb 15, 2021 | 08:21 AM
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Hello Oldkarz,
Thank you for your reply,
The slowdown is stable (rev counter needle stable)
John


Bonjour Oldkarz,
Merci de votre réponse,
Le ralentit est stable ( aiguille du compte tour stable)
Jean
 
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Old Feb 15, 2021 | 09:14 AM
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The only thing that came to mind was a TSB from long ago.
 
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Old Feb 15, 2021 | 10:54 AM
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Yes, your RPM would be stable. The computer will adjust for the extra fuel to the proper RPM. Your engine would vibrate at 1/2 of the RPM value.
 
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