I am hoping its not that, it kinda feels like there is a cylinder misfiring. Its kinda like its not timed properly, at idle its really rough. almost like its stalling, and then as its getting going, its not smooth, the engine is sending a vibration though the car, again most noticable at idle. Its sitting between 500 and 600 RPM at idle right now.
It kinda goes away as the RMP's go up, it shows up again when the engine is put under a load, ie. up a hill.
I hope this helps, the fuel seems to be there as I can sometimes smell fuel, kinda like its running rich.
Paul