Hi i have a 88 3.6 jaguar xj6 sovereign and when i start it from cold it drops to 500rpm sometimes 300rpm and shudders for about 10/15secs then sits at 1000rpm is this normal? And if not what would be causing this? Thanks

 

OK.

Welcome to the Forum.

When time permits please do an Intro in the New Members Area.

Your 1988 3.6 is known as an XJ40, with a AJ6 engine.

The correct Tech Section is the XJ40 area.

A quickie repost in there will get the answers you need.

ALSO, where you are located in the world will also be needed, as different markets had different stuff.