Hey Guys,

Hoping someone might have an idea on what I should do to rectify a stubborn misfire on the 03 XKR. A couple of weeks ago she started rumbling a bit and the CEL came on with P0304 and P1316 which is pretty standard for a misfire. I took a newer coil from my other 03 XKR and swapped it out and the misfire went away and the car drove nicely. Today the misfire returned and on the same cylinder. I swapped another coil out in case the coil went bad but this did not resolve the issue. There is also a P0400 code which came on but I thought was unrelated to the misfire. Of course I am just a novice hence why I am running this by the experts. Thank you in advance for any input and Happy Thanksgiving to all!

Thanks!

Corey

 

P0400 looks to be EGR.

P0304 can be wiring/connector (or occasionally it's figured the wrong cylinder).