Over the last couple of weeks my car seems unwilling to start at the first turn of the key like it use to. Sometimes it takes 2 or 3 goes to start and then the revs seem to fluctuate between 1000-1500 and then idles at 1100 (its always idled at this). I've just changed the coil packs and leads, my exhaust needs replacing and was wondering if it could be connected to this. Shouldn't think so or may be the lamda is on it's way out. Any ideas or similar problems encountered, what was the cause?