Just done head gasket, to clear the emissions on the MOT last month.
Now my 106 1.4i V reg has developed an engine problem.
She runs fine, until at a random point of say 5 miles, the engine starts running lumpy, goes to cut out. But if I keep reving it, it keeps running and clears its self. Sometimes it cuts out. When its running lumpy it gives out black smoke.
Sometimes on tickover, the engine revs drop from normal to 800, and then they pick up to about 1200. Then after a minute the revs drop back down to normal.
Just changed the Lambda, but still has not solved the problem.
Any ideas.