Hi all, I have just recently bought another E30, a 1991 325
convertible to replace the 320 i already have. The new car runs
perfectly when driven but at idle there's a bit of a shudder from the
engine every now and then. You can feel it shaking the car a bit when
sat in a traffic jam for example, not constantly, just a few shudders
every 10 seconds or so. I replaced the rubber engine mounts to see if
they were to blame but it made no difference. The idle speed stays
totally constant even when it shudders. With the engine running and
the bonnet up, you can feel and see the shudder while at idle although
you can't really hear it, no change of engine note or anything. Once
driving the engine runs perfectly.
The car's done 97000 miles and had a full service/inspection 2 just
before I took ownership. Has anyone experienced a similar problem with
M20s or have an idea what it could be?