How to Diagnose Jaguar XJ6 X300 Series Non-Start/Poor Running Faults

ADDENDUM: Keeping in mind this video is far from a comprehensive guide, and more to give you pointers, I recommend visiting the Jaguar-related website by Jim Butterworth (link below) for more details. It is an excellent resource. In the future I may do a part two video covering more non-start/poor running issues on the X300 XJ series. jimbutterworth.co.uk/8jagstart.htm This video is for Jaguar XJ6 X300 series owners who have problems with the car either running poor, or not running at all. There is some crossover of these issues with XJ40 and XJ12 also. Here we do a whistle-stop tour around the car pointing out most of the common culprits leading to running issues on these old Jags. The AJ16 engine itself is a magnificent unit and unlikely to fail mechanically, unless severely neglected. However there are a number of modules and sensors that can be an issue, as well as fuel delivery problems. Diagnosis of these running problems revolves around four main areas: fuel, air, spark and electronics (as with most cars with an internal combustion engine). One omission in the video is cleaning the throttle body, which is different for the XJ6 and XJR6. If the throttle body itself gets very dirty, you may get a sticking throttle and rough idle. This video is a strictly a DIY guide, not professional or sanctioned by Jaguar Cars LTD. Undertake any vehicle repairs purely at your own risk.

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