have rover 45 1.6 with intermittent misfire seems ok when cold gets worst hotter car gets changed coil pack and leads plus new plug... recent oil and filter and just ordered fuel filter seems on low revs not over heating or losing cool lent think head ok car has covered 65,000 miles and pulls well when running fine any help great full

dean, February 2014

Replace the camshaft position sensor with a new one.
The old one has lost its magneticity. See:

http://forums.bimmerforums.com/forum/showthread.php?1444690

http://forums.mg-rover.org/showthread.php?s=db62e439b46992b898b85709543dea11&t=151543&page=2

Let us know that this has cured it.

ChicksFan, February 2014

Have you tried the compressions?

cdc, February 2014