XJ ( X351 ) 2009 - 2019

Rough idle at stops

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Old Jan 23, 2019 | 07:30 PM
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Rego889's Avatar
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Default Rough idle at stops

I have 1998 xj8 non-supercharged with 125k.. I have cleaned the throttle body and put new spark plugs in it..and it is still missing and has a rough idle at all stops.. it also hesitates when pulling away then it smooths out and drives great..can anyone help me?
 
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Old Jan 24, 2019 | 06:36 AM
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First, get all the OBDII fault codes instead of guessing.

Second, post your inquiry in the proper Forum for your 1998 XJ. This is the X351 current model XJ Forum. You need to be in the X308 model Forum. The list of Forums is here:
https://www.jaguarforums.com/forum/
 

Last edited by Stuart S; Jan 24, 2019 at 06:41 AM.
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Old Jun 1, 2019 | 09:46 PM
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Check your oil fill cap. If the gasket is bad or the cap not closed properly, the idle will be rough.
 
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