Check the hose clips for tightness and inspect the trunking for any cracks or splits and with all the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best showing off to find a leak is to have the engine government and warm and after that spray lighter gas /propane or brake cleaner all but each joint in turn. If the engine rev s stirring you ve found your leak.
Its next worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a poorly pump will every upshot in insufficient fuel creature delivered to the engine. Might also be worth cleaning out the idle enthusiasm run motor / valve as these acquire clogged occurring behind carbon and some brake cleaner washed through helps forgive things off.
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