Rough Idle After Cold Start With Code P050D Stored on Jaguar XJR

Problem Description and Possible Solution

On this V8 engine, timing chain problems are very common. Because the timing chain tensioners were made from plastic, they can fail prematurely and cause serious engine damage. A noticeable engine noise while idling or during a cold start can indicate a timing chain tensioner problem. The engine noise may also be accompanied by a rough or uneven engine idle. Improved components are available to remedy this problem.

Problem Data
RepairPal Verified
Average mileage: 206,045 (206,045–206,045)
6 model years affected: 1995, 1996, 1997, 1998, more1999, 2000
7 people reported this problem
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New engine due to timing failure