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PostPosted: Sat Mar 11, 2023 3:10 pm 
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Posts like an LG3
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Joined: Fri Aug 05, 2011 10:53 am
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Location: Margate, England.
Year and Trim: 1998 Buick Park Avenue
:) High y'all,
It's been a long time since I made a post, life got in the way somewhat.
However the Buick has seen some use in the meantime, trouble free until last month when the flrxible manifold to catalytic converter exhaust broke. But a friend of mine is a skilled welder and he fixed it better than new. :)
But today I was checking it over before taking it to a meet tomorrow and the oil light stayed on, and 0 oil pressure showed up on the display. I got underneath and disconnected the switch by the oil filter, but the light stays on and still reads zero on the display. As a quick and (very :sad: ) dirty check I took the switch off and ran the engine for a few seconds, plenty of oil shot out leading me to think it's an electrical issue rathe mechanical lack of pressure.
The switch has 3 pins, I checked with a multimeter and found around 2kohms between one pin and both the others (separately), and a short between the others.
Any ideas anybody?

Roger.


Last edited by rustyroger on Tue Mar 21, 2023 4:17 pm, edited 1 time in total.

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PostPosted: Mon Mar 13, 2023 11:52 am 
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Resident Gearhead
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Joined: Thu May 22, 2008 10:40 am
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Location: West Point
Year and Trim: 2003 SSEi
Just replace the switch Roger. They go bad and that's why the pressure gauge either hits the high stop or reads nothing at all (or the light stays on). To see if you have oil flowing you might be able to remove the oil filler cap while it's running and see if oil is streaming off the rocker right below it.

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PostPosted: Mon Mar 13, 2023 1:17 pm 
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Posts like an LG3
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Joined: Fri Aug 05, 2011 10:53 am
Posts: 368
Location: Margate, England.
Year and Trim: 1998 Buick Park Avenue
Ok, thanks. I'll get on to Rock Auto again. :) :thumbup:

Roger.


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PostPosted: Tue Mar 14, 2023 12:12 pm 
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Certified Bonneville Nut
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Joined: Mon May 10, 2010 6:11 pm
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Location: Chicago, IL
Year and Trim: 2003 SLE
As said above, it is just a switch and a common issue. I've had at least 4 of these fail. They can peg the needle, or they can sporadically make it drop to zero.

Just replace it with a parts store one or if you can manage to wait, with something off the internet. Would avoid the super cheap ones personally.

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PostPosted: Tue Mar 21, 2023 4:23 pm 
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Posts like an LG3
Posts like an LG3

Joined: Fri Aug 05, 2011 10:53 am
Posts: 368
Location: Margate, England.
Year and Trim: 1998 Buick Park Avenue
New switch from Rock Auto (genuine GM), plus a new front transmission mount. Now the oil light goes out on startup and shows 65psi cold, which goes down to 40psi idling hot according to the information display.
Thanks for your advice guys, always check the obvious first.

Roger.


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