XJ XJ8 / XJR ( X308 ) 1997 - 2003

Jaguar XJ8 3.2 Year 2000

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Old May 19, 2008 | 10:47 AM
  #2  
Thermo's Avatar
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Default RE: Jaguar XJ8 3.2 Year 2000

da1, first, check the mass air flow sensor to see if that is clean. If it gets dirty (or oily if you are using a cotton gauze/oiled filter), it can cause the motor to idle erratically. You simply let a little bit of electrical contact cleaner get near the sensor and it will clean it off. DON'T spray the sensor directly. It can break the sensitive wires inside of the MAF sensor.

Next, is the idle moving up and down a few hundred RPM also? If so, your idle air control valve can be sticking and leading to issues. Remove the idle air control valve and use some carb cleaner to get rid of the gunk inside.

After that, I would need to check my service CD for your car and see if there is something else that might poke its head up.

Chris "Thermo" Coleman
 
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Old May 20, 2008 | 07:28 PM
  #4  
FactoryJaguarTech's Avatar
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Default RE: Jaguar XJ8 3.2 Year 2000

Hardware or automotive parts store.
I would offer some suggestions, but we do not have 3.2 motor here. Maybe coils? Idle control valve as suggested sounds likely too.
 
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Old May 21, 2008 | 11:01 AM
  #5  
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Default RE: Jaguar XJ8 3.2 Year 2000

ORIGINAL: FactoryJaguarTech

...Maybe coils?...
Bad coils almost never fire correctly under load.
 
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Old May 21, 2008 | 07:15 PM
  #6  
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Default RE: Jaguar XJ8 3.2 Year 2000

I beg to differ, but let us know how you make out anyway.
 
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