I have finally aquired my long awaited rx7 fdc3 the only problem is it seems to be running a little rough at idle as if it has a bit of a missfire (sort of revs up and down very very slightly) and also smells like it is running a bit rich. I have replaced the spark plugs as they were shot and renewed the leads at the same time but has not made a significant difference. I would of thought that it should run very smooth being a rotory. Also may be a bit of a silly question but do these cars run a lamda sensor. I am a macanic but thease engines are like a new learning curve for me as i do not no a great deal about them, can any body help