Check the hose clips for tightness and inspect the trunking for any cracks or splits and after that every the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best mannerism to find a leak is to have the engine management and warm and after that vaporizer lighter gas /propane or brake cleaner roughly each joint in turn. If the engine rev s occurring you ve found your leak.
Its afterward worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a ill pump will every repercussion in insufficient fuel being delivered to the engine. Might plus be worth cleaning out the idle speed run motor / valve as these acquire clogged going on afterward carbon and some brake cleaner washed through helps forgive things off.
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