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Yes, done a search, hoping to narrow things down. I rebuilt the engine and set everything up fine in 2007. Since then, it's idled beautifully, at around 800rpm. More recently, the idling speed has slowly dropped. 500rpm now, and it just hangs in there, but it's more likely to drop lower and stall. It isn't running evenly at anything below 1200rpm. I've also noticed that, on starting, it immediately runs at around 700rpm, very quickly down to 500. Previously, it started at around 800 rpm, revs quickly rising to around 1400, then reducing to 800 as it warmed up. So it's stopped doing the rise to 1400....does that narrow things down? I've swapped the distributor cap and all leads, and ignition ampilfier. Just taken throttle body off, but it seems surprisingly clean. I'll clean it up now it's off, but from the look of it, doubt that it's the problem. Temperature has no bearing on this; other than it's unlikely to stall for literally the first minute from starting, it's the same hot or cold. Slightly off topic, I changed the AFM a few months ago (don't think it's the AFM as I had hoped that the replacement would resolve this as well as the cutting out....cured the cutting out, but idling continued to worsen). The mixture setting on my original AFM was correct; this one I don't think is far out, but I'd prefer to reset it. Can I do this by screwing my original AFM's adjustment all the way in, counting number of turns, then resetting the replacement AFM's screw to the identical setting?