In the last few weeks, I've noticed:

Fuel consumption has dropped from low 20's to mid teens on like-for-like driving
Kangarooing / hesitation pulling out of junctions has become more prevalent, even in the coldest of cold weather.

Is it time for a new MAP sensor? I don't have a CEL and it still pulls like a train once I put my foot down.

 

Could equally be the primary lambda, in fact more likely.

See if you can borrow a local person's MAP sensor and see if it does the trick first though, as it's easy to replace.

 

Ahh that's a very good point, had forgotten about the "lambada"

 

Yes, the forbidden sensor!

 

If you want to eliminate the MAP (it's most likely the λ) I've got one not doing much...

 

That would be fab if I could borrow it for a day or two, Nick.

 

You're welcome to give mine a try on Saturday if you like, Keith.

 

Well, I'm stuck up here counting beans & not likely to be going anywhere for a while, so if you need one...

 

Lambda generally throws a CEL, whereas the MAP doesn't.

 

Genreally being the word, as they quite often don't even when nearly dead. But I agree, i've never seen a MAP code on an S2000.