misfire help - non Z

Hi,

Our peugeot 306, has developed a pretty much constant misfire / lumpy running,

It seems to me like it is either the coil packs, or the MAF. It's not the O2 sensor as I have disconnected, that, and 306's go into a default program when that is disconnected which causes it to run rich, but smooth, disconnecting it made no difference.

I disconnected the MAF and had the same issue, other than the rev's rose high on first start then settled whilst still being rough and lumpy.

I've had the plugs out, cleaned them, they all looked ok and only went in about 2k ago. I also cleaned the coil pack connectors and re-seated them to make good contact.

I'm thinking it's more than likely the MAF, but as it seems to be a constant lumpyness / misfiring no matter the rev's I'm not sure if maybe it is the coil packs?

When running also for even a couple of mins, there is a real strong smell of burning, it almost smells like the cat is burning (from running waaaay too rich).

So not sure which to buy / try first, don't fancy wasting money though so anyone elses opinions appreciated.

Thanks,