on a lot of vw watercooled engines there are two oil pressure switches. one up on the head and one at the filter/oil pump head. they are of two different values and types. the one on top is a normal closed type (and is the same used ever since bugs) and the one below is a normal open type. the specs for the bottom one are that it should trip if pressure is reached and engine rpm is above a certain point. dont remember the exact speed but it is above idle. the circuit in my jetta (inside computer or chip behind dash) that was supposed to differentiate between a real alarm and not a false one failed. (had fun trouble shooting that.) too expensive so i just went to a double idiot light. green for pump pressure is good and red for top end isnt getting any oil. the bottom one can be replace with a lower pressure one but finding it in the normal closed ones is a little harder to do. jimt |
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