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XJ XJ6 / XJR6 ( X300 ) 1995-1997

Revs high when hot

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Old Jul 16, 2022 | 09:13 AM
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Default Revs high when hot
When the engine is cold after about 10 min driving the idle speed gets higher and higher.. if the car sits in the sun for a few hours then the idle speed is high from the beginning ..anyone know the cure
 
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Old Jul 16, 2022 | 09:43 AM
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Start by looking at fuel trims (there are 4) when it does that.
 
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Old Jul 16, 2022 | 10:37 AM
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Originally Posted by Jag1066
..anyone know the cure
Welcome to the forums Jag1066,

Anyone know the vehicle!

Please add MODEL and YEAR and I'll move your question to the relevant model forum.

Graham
 
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Old Jul 16, 2022 | 11:50 AM
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Originally Posted by GGG
Welcome to the forums Jag1066,

Anyone know the vehicle!
  1. Please add MODEL and YEAR and I'll move your question to the relevant model forum.

Graham
It’s a jaguar. 300 x sovereign 1997
 
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Old Jul 16, 2022 | 02:04 PM
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Originally Posted by Jag1066
It’s a jaguar. 300 x sovereign 1997
Thanks for the clarification.

I've moved the thread from General Tech Help to X300 forum and added those vehicle details to your signature.

Graham
 
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Old Jul 16, 2022 | 04:38 PM
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When was the last time you replaced the Coolant Temp Sensor. Cheap and easy.
 
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Old Jul 17, 2022 | 01:29 PM
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I’ll try that next..I think that’s when it all started ..that was replaced when they were trying to fix the heater.. I’ll let you know if it works
 
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