My BA XR6 Turbo has an intermittent missfire at idle. It doesn't seem to do it much when it's cold but once it's warmed up it's really noticeable. When it's cold it hesitates going up my driveway which is on a reasonable incline. I usually stay in first (manual gearbox) and just take it easy and I can feel the car surging / missing as I go up the hill.

I can hear the exhaust popping when standing at the back of the car and when sitting in the car at idle I can feel the car shaking. I can also feel a surging as I decelerate going down a hill in any gear which I have linked to the missfire aswell. I have had the plugs replaced and the coils replaced. Any suggestions?

Judging by your symptoms in your post and the noises from the front end in your other topic you need to get the cam timing check.

Shot in the dark would be timing chain guide is kaput and cam timing has skipped as a result.

Thanks for the quick reply. If the cam timing had skipped would it usually be both cam gears skipped or just one and now it's running slack? Sometimes when I boost it makes a hell of a racket up there

Could be one, could be both. Either way it needs looking at.

Set it on top dead centre and check.