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Join Date: Jun 2004
Location: Lexington, MA, USA
Posts: 12
Oil Pressure Gauge Problem

It's a 1988 944 NA. The oil pressure gauge now stays at the maximum all the time. The car drives OK.

Any idea and tips about what to check and fix?

Thanks

Ted
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Ted Wu
1988 944NA, 5 Speed
Old 06-07-2004, 03:48 AM
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Join Date: Feb 2001
Location: Viera FL
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CHeck the wiring at the oil pressure sender (it is right under the oil filter)

If the wiring is OK, you will probably have to replace the sender

AFJuvat
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Old 06-07-2004, 04:40 AM
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Any specifics about checking the wiring? For example, voltage
or resistance measurement on certain wires?

Is there any way to check if the oil pressure sender is still good?

Ted

Quote:
Originally posted by AFJuvat
CHeck the wiring at the oil pressure sender (it is right under the oil filter)

If the wiring is OK, you will probably have to replace the sender

AFJuvat
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Ted Wu
1988 944NA, 5 Speed
Old 06-08-2004, 10:21 AM
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Unplug one wire from the sender. Turn your ignition on (don't bother starting the car). See what it does. Ground the wire to the frame. See what it does. Do the same with the other wire (one is for the idiot light, one is for the guage). If there is no difference then you have a bad wire. If there is a definite difference you have a bad sending unit (common). If I remember correctly with the guage wire ungrounded (i think it is blue) the gauge pins out. Grounded it goes to zero.
Old 06-08-2004, 01:15 PM
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