Thanks for the info chaps.
My FPR is little more than a lump of iron ore. It is the single most rusty part of the whole car, so I reckon I'll change it anyway. I'm just being tight by trying to avoid spending money too hastily in case it could be something else.
Another though occurred to me tonight. When I pulled off the vacuum hose, it came off very freely. I wonder if air is getting in though it, as that would be after the MAF sensor sensor, so maybe the lambda sensor was detecting a lean mix (am I right in thinking the light comes on if the mix is too lean as well as if it is too rich?)
I'm going to chuck through some fuel system cleaner in case the injectors are sticking. When I can afford it and have the time, I'll see if Jim on here will clean my injectors properly for me.
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