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Under Car Fuel pump operation

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I'm fixing a 1985 MK 1 GTI Convertible, checking the fuel system, I've removed the under car fuel pump and am trying to understand if it's working

Hi, I'm trying to check the operation of the under car fuel pump.  When current is applied across the terminals it clicks, but does not pump.  Would you expect it to pump, or is it waiting for some fuel pressure (threshold) to be reached first? IMG_4917.jpg

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It should spin with a 12v supply

Regards Volkswarren

X2 1983 A REG EW CAMPAIGN In WHITE(Awaiting full rebuild solid body) :thumbs: & T Reg S1 GTi Project, Still Looking for Series 1 GTi's or a 16S Oettinger to restore (Complete Cars only)  or an A reg Lhasa Green or White Gti to restore, also consider  Black, Red or Blue, Also Golf Driver Project Wanted anything considered WHY
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