Has anyone got any experience, or advice, as to why a 1995 3.9 v8 would cut out When stopping going down a steep hill?

Absolutely no issues on the flat or lesser hills, just on the steep ones.... though I did find, second drive, bit early to say it was definitive, that if I pushed the clutch a few times just before the junction it wouldn’t stop.

After it did it to me first drive internet wisdom suggested a sooted up idle control valve, so I checked, it was a bit dirty, I cleaned, and took another drive but still the same.


1995 Plus 8
1984 4/4 4 Seater (prev)