Guest daveagain909 Posted February 19, 2009 Share Posted February 19, 2009 my 90 conv with 122k miles has what I think is a wierd problem which I need your advise on, when dirving the oil pressure gauge reads very high on the gauge and only backing off a little from highest reading at times. I just drove it to florida from north carolina and the car ran great with no problems, shuld I be worried about this reading, I alway think high oil pressure is good? I am thinking it may be a sensor? any ideas? Link to comment Share on other sites More sharing options...
Ronnie Posted February 19, 2009 Share Posted February 19, 2009 You are describing the symptoms of a bad oil pressure sensor. I had the same problem not long ago. New sensor fixed it. 1 Link to comment Share on other sites More sharing options...
Enoytsur Posted February 19, 2009 Share Posted February 19, 2009 I too had that problem on my former Reatta. That Reatta had high mileage so I used a $20.00 Discount Auto Sensor to fix it. A GM/AC Delco Sensor I believe runs about $80.00 at the Dealership (maybe less with the Buick Club Membership). I use GM/AC Delco if avaiable on my current Reatta thus I would spring for the higher-dollar Sensor.The Discount Auto Sensor worked fine.The installation is a tad cumbersome because of the Sensor's location but not earth-shattering. Go for it, a cheap way to ease your mind.See ya, John in Sarasota Link to comment Share on other sites More sharing options...
padgett Posted February 19, 2009 Share Posted February 19, 2009 Is not difficult, have changed on a curb with a pair of pliers before. GM part number (88-90) is 3532954 (this same sensor can be used in a 91 but will have the wrong gain value & will read high)However the sensor is delicate, is better to use the right socket and be gentle - tighten about like a spark plug.Problem was so common that GM issued a TSB about it. (90-6D-6 "...erratic or displays high oil pressure...") Even the FSM says if in doubt, attach a mechanical guage.Incidently the actual reading from the sensor is on BD71.Having three cars with 3800s now, I generally keep a spare around since nearly every car I have had has needed one. 1 Link to comment Share on other sites More sharing options...
Guest daveagain909 Posted February 19, 2009 Share Posted February 19, 2009 where exactly is the sensor located? Link to comment Share on other sites More sharing options...
padgett Posted February 19, 2009 Share Posted February 19, 2009 On top of the oil filter housing. Oil filter faces down, sensor faces up. 1 Link to comment Share on other sites More sharing options...
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