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3800 oil pressure problem. by fieroluv
Started on: 01-11-2008 07:37 AM
Replies: 9
Last post by: fieroluv on 01-14-2008 07:02 AM
fieroluv
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Report this Post01-11-2008 07:37 AM Click Here to See the Profile for fieroluvClick Here to Email fieroluvSend a Private Message to fieroluvDirect Link to This Post

I have a 3800 n/a engine out of a 2001 Pontiac Bonneville. Last night the oil pressure started reading about 110 psi all the time. At the same time it set the check engine light. I haven't had the time to check the codes yet. But I was wondering if there is anything mechanical that could cause high oil pressure. Or am I more than likely just looking at a new sending unit.

Thanks in advance.
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James Bond 007
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Report this Post01-11-2008 10:59 AM Click Here to See the Profile for James Bond 007Send a Private Message to James Bond 007Direct Link to This Post
Thats the only thing I can think of,is a bad sending unit.
(oil pump?)

[This message has been edited by James Bond 007 (edited 01-11-2008).]

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fieroluv
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Report this Post01-11-2008 11:09 AM Click Here to See the Profile for fieroluvClick Here to Email fieroluvSend a Private Message to fieroluvDirect Link to This Post

Yeah, I guess if the pressure spring broke in the oil pump it could read high.. hmmm I guess it's time to invest in a mechanical gauge to test it.
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Phil
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Report this Post01-11-2008 01:17 PM Click Here to See the Profile for PhilClick Here to Email PhilSend a Private Message to PhilDirect Link to This Post
Normal pressure for the SC motor is around 80 PSI if that helps at all
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darkhorizon
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Report this Post01-11-2008 09:01 PM Click Here to See the Profile for darkhorizonSend a Private Message to darkhorizonDirect Link to This Post
There is a checkvalve in the oil filter cover that controls oil pressure. It may have gotten stuck or somthing.
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Ken_86gt
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Report this Post01-11-2008 11:35 PM Click Here to See the Profile for Ken_86gtClick Here to Email Ken_86gtSend a Private Message to Ken_86gtDirect Link to This Post
Would high oil pressure set the check engine light?
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darkhorizon
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Report this Post01-12-2008 12:49 AM Click Here to See the Profile for darkhorizonSend a Private Message to darkhorizonDirect Link to This Post
no, the only thing that monitors oil pressure is a switch that is on or off at 3psi.
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fieroluv
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Report this Post01-12-2008 07:19 AM Click Here to See the Profile for fieroluvClick Here to Email fieroluvSend a Private Message to fieroluvDirect Link to This Post
Yeah, the check engine light is apparently just a coincidence. It's a code 102. vacuum leak or MAP sensor. I don't see any vacuum leaks or hear any for that matter. So I might try and test the map sensor.

I'm not the one who drives that car, my wife does so I did some further monitoring yesterday. I guess the oil pressure isn't staying at 110. Yesterday when I checked, it appears to be idling at 80 and when driving it hangs between 105 - 110. Like I said I hardly ever drive that card and don't really know what normal is. She just said it's higher than usual.
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darkhorizon
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Report this Post01-12-2008 05:18 PM Click Here to See the Profile for darkhorizonSend a Private Message to darkhorizonDirect Link to This Post
what gauge are you using anyway? the fiero gauge only goes to 80, and its very inaccurate.
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fieroluv
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Report this Post01-14-2008 07:02 AM Click Here to See the Profile for fieroluvClick Here to Email fieroluvSend a Private Message to fieroluvDirect Link to This Post
It has autometer guages in it. The max out at 120 psi.
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