Rough engine Idle

Post by **chrisjenner** » Sun Sep 02, 2007 8:33 pm

I find that once it has warmed up the engine vibrates quite a lot at tick-over, and I get uneven 'lumpy' low speed running in 1st and 2nd gears, yet 3rd and 4th are smooth at even the lowest speeds.

Can anyone tell me the reason and cure?

Post by **MoggyTech** » Sun Sep 02, 2007 9:28 pm

Assuming mixture and timing are ok, I would suspect the Vacuum unit on the dizzy.

Post by **chickenjohn** » Sun Sep 02, 2007 9:33 pm

another possibillity is a burnt exhaust valve.

Post by **bmcecosse** » Mon Sep 03, 2007 12:06 pm

Or a blown head gasket. Suggest you first check the valve clearances - and have a look at the spark plugs - may be as simple as a new set of plugs. If it continues - get a compression test on the engine - that will tell all!

Post by **AndrewSkinner** » Tue Sep 04, 2007 12:02 am

I had the same problem and it turned out to be an exhaust valve!

hope you get it sorted!