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Old 11-10-2007, 08:45 PM   #1
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Default New AC Delco oil pressure sensor

It'* maxing out my gauge. It does have a short body compared to the old one, and it'* part number is 25535479, the only ACDelco part listed by Rock Auto.

Is it possibly the wrong part? Should the battery be disconnected to recognize the signal? Or is it just bad out of the box?
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Old 11-10-2007, 09:10 PM   #2
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Sounds a lot like its bad out of the box... Does it have any Bent Pins? It is a 4 pin right?

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Old 11-10-2007, 09:11 PM   #3
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I don't think so. The connector plugged right in. Although it was a bit of a stretch. My wiring was just barely long enough to reach the shorter bodied sensor. Yes, 4 pin.
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Old 11-10-2007, 09:22 PM   #4
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might be bad... Not sure.... That oil pressure sender crosses from 1990-99

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Old 11-10-2007, 10:21 PM   #5
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I checked to make sure, and the needle does swing like it should at key on. It settles on 0 if I don't start the engine, and max if I do. So it looks like I DID NOT damage the wiring pulling on it to get a little extra reach.
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Old 11-10-2007, 11:55 PM   #6
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How much oil do I stand to lose if I pull it without pulling the filter?
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Old 11-11-2007, 12:06 AM   #7
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Quote:
Originally Posted by J Wikoff
How much oil do I stand to lose if I pull it without pulling the filter?
Not 100% John.... It shouldn't be very much at all, being that most of the oil will be in the Pan and the filter.. so very little..

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Old 11-11-2007, 12:14 AM   #8
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I broke the one on my 95 when I pulled the axle and had to get a new one. I didn't loose more than a quart that I can remember. This was just 3 weeks ago.
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Old 11-11-2007, 01:33 AM   #9
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Well I undid the battery for a few minutes then took it for a drive to see what would happen. Same thing, but now the PSI is maxed with the engine not running instead of 0.
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Old 11-11-2007, 01:43 AM   #10
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I just changed mine on the PA a couple weeks ago. I lost maybe a few ounces of oil. I took the old sensor out, plugged it the hole with my finger and then stuck the new one in as quick as possible.

I agree it sounds like you got a bad new sender.
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