E34 530i Wont idle when hot

Still having this issue :( replaced the PCV valve and its made no difference... feed line doesn't seem to get any pressure at all so am i right in thinking fuel pump next?
 
Month on and.... Still the same :cry:

Replaced the fuel pump yesterday, took it to a mates garage and half way their the temp hit 12 o clock and it wouldn't idle... fine when flooring it or doing over 40 (not a single issue) but under 40 coming to a stop is a nightmare... having to heal and toe to keep it running while mashing the clutch which isnt good...

Anyone any last ditch ideas as i feel like i have done everything possible and its still being difficult...
 
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