replacing oil sending unit?? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 09-13-2003, 05:39 PM   #11
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Well i replaced the sensor, it was really easy, thanks to all of your help, i put the teflon tape on the threads and screwed it in, anyhow, i still have really high pressure, and still fluctuates, i think mabey it is in the guage itself, i am going to buy a mecanical guage and install it. then i will know for sure what my pressure it, but with that electical one out i will get a "check gauges light"??
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Old 09-21-2003, 04:34 AM   #12
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Quote:
Originally Posted by bonneville1992
Well i replaced the sensor, it was really easy, thanks to all of your help, i put the teflon tape on the threads and screwed it in, anyhow, i still have really high pressure, and still fluctuates, i think mabey it is in the guage itself, i am going to buy a mecanical guage and install it. then i will know for sure what my pressure it, but with that electical one out i will get a "check gauges light"??
I havesame problem. Oil pressure gauge always remains high and fluctuates slightly. I am wondering if the guage is NFG Did u find out if your guage is the problem?
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Old 09-21-2003, 11:07 AM   #13
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Quote:
Originally Posted by bonneville1992
Well i got the sensor today, 32.00 cnd. anyhow i will let you all know how it goes. what is the regular pressure supposed to be at idle, in Klps?? anyone happen to know?
Should read about to the half way mark (or 12 O'Clock).
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Old 09-21-2003, 04:28 PM   #14
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Quote:
Originally Posted by kerker
I havesame problem. Oil pressure gauge always remains high and fluctuates slightly. I am wondering if the guage is NFG Did u find out if your guage is the problem?
One of the problems with the Pontiac'* oil gauge, in my opinion, is that its voltage source is poorly regulated. There appear to be some resistances involved.... perhaps what we used to call "ballast" resistances, I don't know... but if any of them change their characteristics at all, it would look like the oil gauge would be affected.

Also: from the fuse, through the gauge and sensor, to ground, there are no less than 6 connections...not counting the connection at the fuse or the connection to ground.
If any one of them is corroded the gauge will be affected.

On my 94, the gauge fluctuates even before the car has started, after the self test cycle has completed. To me, this is more an indication of minor electrical problems, most likely in these resistances, or in corroded electrical plugs... rather than the gauge or sensor itself.

I have long ago abandoned hope of the Bonne providing an "accurate" oil pressure reading, and rely instead on what the "normal" characteristics appear to be for my particular car. I get worried where there is a change from these, rather than the actual value being shown.
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Old 09-22-2003, 05:08 PM   #15
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Quote:
Originally Posted by bonneville1992
i think mabey it is in the guage itself...
Had identical problem with almost identical mileage as your unit. Still under warranty so took it in to dealer. I was suspecting the sending unit myself but the service foreman said this was a common dash problem (much more so for ? reason on cars with CDN metric dashes). Whole dash assembly was sent to GM regional facility for a week. 180,000 km later still working perfectly.

They also fixed the empty when full trick on the gas guage.
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Old 09-22-2003, 05:09 PM   #16
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How were you able to find one with such low mileage?
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