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Old 10-05-2005, 22:50   #1 (permalink)
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confused Oil Presure drop off

While I am driving the oil presure is fine but when I sit in traffic after running for a while the presure just drops and the alarm goes off. I am wondering if it is one of the following:

1. Engine is heating the oil to high a temperature and itis getting to thin?

2. There is a problem with the presure pump?

3. Radiator is not cooling the engine enough?
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Old 10-05-2005, 23:04   #2 (permalink)
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Re: Oil Presure drop off

OK bud, happy to help but, More info needed.
What model car, what engine (assume Windsor), what size engine, what modes, how many k's, what oil do you use, etc..
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Old 10-05-2005, 23:34   #3 (permalink)
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confused Re: Oil Presure drop off

ok model is 1996 fairmont 4lt auto.

oil is 20w 50

milage 201850

not sure if it is a windsor??
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Old 10-06-2005, 00:09   #4 (permalink)
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Re: Oil Presure drop off

I think it's most likely the oil pressure sensor on the motor.
Replaced mine and all was good thereafter.
It put my mind at ease seeing the pressure back to normal.
PS. Windsor refers to a type of V8 engine, but the pressure sensor/sender units operate on the same principal.
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Old 10-06-2005, 00:50   #5 (permalink)
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Re: Oil Presure drop off

Maybe time to rebuild the motor, or fit a Cleveland, i mean windsor
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Old 10-06-2005, 03:48   #6 (permalink)
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Re: Oil Presure drop off

Fairmont,
I only asked re the Windor as you have posted this thread in the V8 Windsor Forum. You have a 6 cyl so this is not a Windsor...
Sounds a bit strange that the motor is fine while driving then drops off. I would have thought if the oil pressure sensor was dud, then it would be intermitant, not like you have discribed. (I could be wrong) Try it, but I dont think it will fix your problem. Sounds a bit more drastic. When was the last oil change? Is it using oil?
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Old 10-06-2005, 15:23   #7 (permalink)
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confused Re: Oil Presure drop off

Quote:
Originally Posted by bdennis
Fairmont,
I only asked re the Windor as you have posted this thread in the V8 Windsor Forum. You have a 6 cyl so this is not a Windsor...
Sounds a bit strange that the motor is fine while driving then drops off. I would have thought if the oil pressure sensor was dud, then it would be intermitant, not like you have discribed. (I could be wrong) Try it, but I dont think it will fix your problem. Sounds a bit more drastic. When was the last oil change? Is it using oil?
No it does not use any more oil than normal the problem only seens to happen when the car is idleing in traffic. If I can raise the revs to over or on 1000 then the light goes out but the presure is still low but once traffic starts moving it goes back to the top. I have had a new head fitted and new transmision and the oil from the transmission goes through a seperate oil cooler, do I need one for the engine oil???
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Old 10-06-2005, 15:25   #8 (permalink)
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Re: Oil Presure drop off

Quote:
Originally Posted by fairmont
No it does not use any more oil than normal the problem only seens to happen when the car is idleing in traffic. If I can raise the revs to over or on 1000 then the light goes out but the presure is still low but once traffic starts moving it goes back to the top. I have had a new head fitted and new transmision and the oil from the transmission goes through a seperate oil cooler, do I need one for the engine oil???
I have asked and been told that the oil is too thin and need a thicker oil.
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Old 10-06-2005, 17:16   #9 (permalink)
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Re: Oil Presure drop off

Fairmont,
That does make sense.. Change the oil for thicker stuff and see how you go.
How is the pressure when you first start it? (Cold) is it OK ?
Then when the oil heats up does it start to drop when idling?
If so sounds like the wrong oil....
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Old 10-06-2005, 18:43   #10 (permalink)
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Re: Oil Presure drop off

If as you said your oil is 20w 50, I don't think it's too thin.
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