Fuel cut off valve - Alfa Romeo Forum
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  (Post Link) post #1 of 4 Old 18-01-10 Thread Starter
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Fuel cut off valve

Guys, can anyone tell me how the fuel cut off valve under the passenger seat works? is it electrical and what triggers/controls it?

Reason i ask is i'm wondering if it has anything to do with my cut out problems?. . .
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  (Post Link) post #2 of 4 Old 18-01-10
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I thought it was a spring loaded magnet, so that when it gets a sufficeient (like moving the passenger seat in a clumsy way) jolt the magent separates and cuts off the fuel supply. May be wrong though.
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  (Post Link) post #3 of 4 Old 19-01-10
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The cut-off switch is an inertia type switch, triggered by a sudden jolt (i.e. in the case of a crash).

However, going by your other post you say the car will restart on it's own again after a while. If this is the case then it won't be the fuel cut-off switch as that switch needs a manual reset every time it is triggered and you haven't said you are having to keep resetting that switch before trying to start the car each time.
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  (Post Link) post #4 of 4 Old 21-01-10
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It's triggered by inertia and it latches until you push the reset.. The fuel pump cuurrent does go through it, so corroded electrical connectors on it could cause your cut-out issues (My brother's FIAT Bravo is doing exactly this).

But the Fuel pump current also goes through a relay in the BBoB, examine that 1st.
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