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1991 Volkswagen Vanagon 2.1 L

Trans:         Standard
Mileage:       200,000 kilometers
VIN:           WV2ZB0256M

Misc Data:     Synchro
Affected Item: oil light
Condition:     flashing

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After installing replacement engine, oil light flashes when
engine is warm and idling. I installed a new grey oil
pressure sensor in the port below the water pump. This did
not change anything. I then found out that there is a
second oil pressure sensor between the push rod tubes on
the left side of the engine. I replaced that one with a
known good grey switch. This did not change anything. I
have not checked the actual pressure because I do not have
the necessary adapters for my oil pressure gauge, and also
because of the inaccessibility of the ports. I measured the
resistance of the switches and found them to be 2.5k with
the engine off and about 400 with the engine running. Can
anyone explain to me how this system works? Things were so
much simpler when VW's used air to cool their engines!
Thank you in advance.

Richard Meissenheimer
bonnie_baker@telus.net
Technician/Shop Foreman
Lakeside Auto Sales
Nelson, British Columbia, Canada

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