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oil pressure suddenly drops

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  #1  
Old 04-23-2011, 02:04 PM
octaneforce
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Default oil pressure suddenly drops

i have a 2000 durango w/ the 4.7. when i first start driving it while its cold, the oil pressure gauge will suddenly drop to zero for a second, and then the check gauges light comes on. it only does this for a breif moment, and then everything goes right back to normal. i dont hear any strange noises and there is not a lack of power. it will do this two or three times until it is warmed up. any ideas? -thanks
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Old 04-23-2011, 02:27 PM
gr8scott72
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Quote:
Originally Posted by octaneforce View Post
i have a 2000 durango w/ the 4.7. when i first start driving it while its cold, the oil pressure gauge will suddenly drop to zero for a second, and then the check gauges light comes on. it only does this for a breif moment, and then everything goes right back to normal. i dont hear any strange noises and there is not a lack of power. it will do this two or three times until it is warmed up. any ideas? -thanks
Either oil pump or sending unit is going bad. Hope it's not your oil pump.
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Old 04-23-2011, 03:04 PM
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Sounds like the oil pressure sensor.
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Old 04-23-2011, 06:59 PM
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+1 hydra, sounds to me like the sending unit if you were loosing oil pressure you would be hearing it
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Old 04-23-2011, 10:20 PM
octaneforce
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i was also praying that its not the oil pump. how can i test if its the sensor/sending unit? would any of this show up if i hook it up to a scanner?
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Old 04-23-2011, 11:05 PM
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the best way to check the sending unit is to either replace it, or hook up a mechanical gauge and see what that does when the gauge on the dash drops
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Old 04-23-2011, 11:43 PM
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Or just replace it cause it's only like $15 bucks?
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Old 04-24-2011, 07:51 AM
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that was my first suggestion . . .
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Old 04-24-2011, 09:38 PM
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okay. where is the sending unit located? do i have to take apart the dash? sorry to sound so newbish, its just not something ive done before.
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Old 04-24-2011, 09:58 PM
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No the sending unit is way easier to replace than you think. In fact its much like replacing an O2 sensor. The sending unit is located right by the oil filter, actually between the filter and the engine block.

Heres a diagram to help you ou where it's located at. Number 4 is pointing at it...

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