That was me. My AFM has been a bitch lately. I cleaned it and the plug so many times and I just couldn't work out what the problem was!
Got it sorted now though, it was the secondary connection on the strut tower (which I didn't realise it had!!) that was full of sand and dust and shit. Pulled over and flushed it with WD40. Was that you going past in the silver 33 giving a big turbo vent salute?