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Oil Pressure Keeps Fluctuating

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Old Mar 13, 2006 | 11:12 PM
  #1  
quisterio's Avatar
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Joined: May 2005
Posts: 479
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From: Glasgow, KY
Car: 87' GTA
Engine: 350 L98 TPI
Transmission: 700-R4
Axle/Gears: 3.27 9-Bolt
Oil Pressure Keeps Fluctuating

Hey folks, my car's oil pressure is acting very wierd.

When I start the car the oil pressure tops out at 60, but then gradually goes down to one spot above 0 PSI, (Digital Dash)

When it gets that low the pressure starts to fluctuate between 0 and 30 and continues to do so.

The car runs perfectly fine when it's doing this, even right at 0, but I still dont want to take a risk of messing something expensive up.

How do I get the pressure to stop jumping around?
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Old Mar 13, 2006 | 11:44 PM
  #2  
84z28350's Avatar
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Joined: Aug 2005
Posts: 3,004
Likes: 4
From: Yellowknife, NWT, Canada
Car: 84 Z28
Engine: 357
Transmission: TH-350C
Axle/Gears: 3.43
Most likely just the sending unit has bit the dust.

You can either spend a few bucks and replace the sending unit in hopes that is the problem or spend about the same ammount of money and get a mechanical gauge to throw on there to check the pressure. Then if it all checks out good on the mechanical gauge its either the sending unit or the gauge itself that is pooched.
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Old Mar 14, 2006 | 10:28 AM
  #3  
ZEEYAA's Avatar
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Joined: Mar 2005
Posts: 357
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From: DULUTH GA.
Car: 1991 Z-28
Engine: 383 / TPIS MINI RAM
Transmission: 700-R4
Axle/Gears: MOSER 9IN 3.89
Its the sending unit, mine done the same thing, changed it out and fixed the problem. When you get one make sure its the right range, I think they make 2 different ones so just double check the numbers....GOOD LUCK.
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Old Mar 14, 2006 | 02:51 PM
  #4  
SLEEPER 86's Avatar
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Joined: Jun 2003
Posts: 627
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From: Carson City Nevada
Car: 86 coupe
Engine: 383
Transmission: 700r4
Axle/Gears: 9 bolt 3.27 posi
have you checked your oil lately?
if you were a few quarts low,the same thing would happen
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