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Why do I need some throttle pressure to start an EFI engine? By opening the throttle are you telling the computer more gas or more air? Fuel delivery checks good, pressure with no bleed back. No codes other than 12. Runs well but an intermittent problem with the engine cutting out when removing throttle pressure to slow down.
Recently acquired, it runs well but if it sits for awhile between starts, especially overnight, it's very reluctant to fire. After six or so hits, it'll finally catch and all's well. Could this be the fuel regulator allowing fuel pressure to bleed off. The pump makes the normal working noises but the fuel filter could be suspect.