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FIXITMAN, Master Technician
Category: Buick
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1994 buick roadmaster: My oil pressure guage..fluctuating..between 30

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My oil pressure guage starting fluctuating between 30 and pass 60 in a 1994 buick roadmaster. What could be the problem?
HelloCustomer does the gauge move quick from one side to the other?
Customer: replied 6 years ago.
yes it moves quickly. while idling it is on 30 and when I get to the speed of 70 the needle goes past 60 and lay flat until I slow down. the needle never go below 30.
If the gauge is fluctuating that much then it is more than likely the pressure sensor. It is common for this to fail internally and cause the gauge to fluctuate.
Customer: replied 6 years ago.
Ok, so do you recommend I change the sensor first? If still fluctuating, which route should I go?
Yes, start by changing the sensor. It is on the back of the engine as shown. If the problem persists then you may have an oil pump issue.

FIXITMAN and 4 other Buick Specialists are ready to help you
Customer: replied 6 years ago.
ok thank you so much.
No problem. Let me know if you need more help.

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