5000S Wagon L5-2309cc 2.3L SOHC (NF) (1988)
1984-1985
1986-1988
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remove fuel pump relay from fuse/relay panel (see arrow)
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VW 1348/3A switched OFF
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connect VW 1348/3A to fuse/relay panel in place of fuel pump relay
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turn switch of VW 1348/3A ON for 15 seconds then switch OFF
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watch pressure drop on gauge
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should not drop below 2.6 bar (38 psi) after 10 minutes
If pressure NOT OK
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check fuel supply connections
If connections OK
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replace fuel pump check valve