Hi. I just recently purchased a 2004 Jaguar XJR and its got 160xxx miles on it and everything seemed great on it. Engine was really smooth and so is the transmission. (Was overhauled less than 10xxx miles ago) yesterday on my way home the cel light turned on so I took it to autozone and it thew codes p0442 evapporative emission leak detected (small leak) which said it could be the gas cap or the gas filler tube. But I'm not worried about that. We did a second scan on it and it popped up with P0302 Cylinder 2 misfire detected. So I'm not sure on where to start. Autozone recommended spark plugs and coil pack replacement. Was gonna do that but was wondering if anyone has had similar issues and what they did to fix it. I also think my air intake gasket going to my supercharger has a leak. Gonna check when I get home but just wanted to hear others opinions on what it might be or if you have been there. Just got the car less than a week ago. It had a full inspection before I got it. Thanks

 

Welcome to the forums XJR777,

There's 10 possible causes of a P030x error code:
1. ECM to ignition coil primary circuit fault
2. Fuel injector circuit fault(s)
3. Ignition coil failure
4. Spark plug failure / fouled / incorrect gap
5. Cylinder compression low
6. Fuel delivery pressure (low / high)
7. Fuel injector(s) restricted / leaking
8. Fuel injector(s) continuously open
9. Fuel contamination
10. Worn camshaft / broken valve spring(s)

Before spending on spark plugs and coil(s), the recommended troubleshooting technique is swapping the coil to a different positioin and see if the fault code also moves. If it does, you have a faulty coil; if it doesn't, it's one of the other possible causes.

Follow this link https://www.jaguarforums.com/forum/x...-x350-x358-28/ to the X350 forum for help, advice and information. The 'HOW TO' thread at the top is a good place to start for information on regular issues. You can also use the US Southwest Region forum by following this link https://www.jaguarforums.com/forum/us-northwest-64/ to find other members in your region.

Please add vehicle details to your Signature to help others to give relevant advice. Go to the User CP button on the left of the top menu bar, then Settings & Options under Your Control Panel. Select Edit Signature and enter the details.

Enjoy the forums.

Graham

 

Welcome aboard.

 

Welcome to the Forums.

 

Welcome to Jaguar Forums XJR777,

Good to have you with us.
Enjoy the forum.

If you haven't done so already you should add your car details to your signature to help others to help you.
If you need help with getting around and using the forum follow this link for some help Forum Help

 

welcome to the forum - enjoy!!!

 

Thank you. I'm gonna give that a try when i get home and hope that is the issue. If not I guess I'll go from there. Appreciate the info

 

Hello,
Welcome to the forums from ElinorB.
(';')

 

Welcome to the forums.