My jaguar blows the 400 amp mega fuse in the truck on startup, starter tested good , started having this problem after I installed injectors, any help would be greatly appreciated.

 

Dercur, for you to be blowing that fuse, I would be looking at the main line running from the front of the car to the rear. It has gotten pinched on some metal. Because of doing the injectors, odds are, you are looking at a wiring problem in the engine bay. So, I would be following the large wire coming out of the fuse box and running towards the rear of the car. Most likely, where the wire runs near the motor is where you are going to find your issue.

 

ok I’ll look there but I also have these codes and the car runs rough since it did start before blowing that fuse, I’m not sure if these codes are due to that fuse being blown or what.

 

This thread may be related to you.

https://www.jaguarforums.com/forum/xj-x351-53/first-problem-new-xj-may-big-one-219286/

Their timing chain jumped a tooth. Caused problems with their starter.

 

Basically, I installed injectors which by the way were said to be refurbished, however the #7 injector failed, and loaded the cylinder full fuel in which hydro locked the engine which caused that 400 amp fuse to blow, so I replaced that injector with another changed plug and replaced the blown fuse and everything is as it should be now

 

Boy that IS a weird one for sure!!
Thanks much for reporting this as I would never have found that!
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