low oil pressure light

Asked by Guru1X2PK Sep 02, 2019 at 11:45 AM about the 1994 Buick Roadmaster Limited Sedan RWD

Question type: Maintenance & Repair

when accelerating fast the low oil pressure light comes on the oil pressure
gage stays up but when you back off the accelaratore the light goes out as long
as you drive at a normal pace. why is the car doing this.

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Rancherodan answered 5 years ago

First thing I would do is get a real oil pressure gauge and make sure you have oil pressure. Check your oil and if it is more than 1 qt low this could possibly cause this to happen. Could be a clogged/defective filter (I have had this happen to me with fram filters) If this all checks out then check the connection at the oil sending unit.

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Guru9CDBW9 answered 3 years ago

NOPE, that is not the first thing to do. Just get a new oil pressure switch. The Original design sucked- the replacements are not that good either, but they will work quite awhile before they go. They are reasonably priced so get an OEM. There are youtube videos on how to change them. It is pretty easy. Jack up the driver front wheel. Take the appropriate wrench and a headlamp. Also clean the surfaces with brake cleaner. The connector is a little trick, but doable if you take your time- 15 minutes tops.

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