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Low Oil Pressure on 1992 Chevy 1500 Pickup Truck

When the engine is first started the Oil pressure guage 'Red lines' on the high end. As the engine warms up and the oil begins to thin the pressure goes down to about 30. After about 45 minutes of driving as I'm sitting and idling, it reads 0, and the Check Guages light comes on. It will basically stay there or just barely come out of the 0 mark. It only reads high (Normal) at the start.

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  • jcasady4 Dec 28, 2008

    Just for giggles I located the Oil Pressure sensor (Switch) just to see where it was, and I found it to be very wet with Oil. Maybe this is a clue. Could it be leaking from there or loose?

  • Anonymous Mar 13, 2014

    intermittent check engine light. codes say misfire and fuel guage. noticing once in a while the fuel guage goes all the way down and the low fuel light comes on. after a few minutes it goes back to normal. today i noticed the oil pressure is higher than normal and voltage guage reading higher than normal. also the tow haul working intermittently. could this be a ground issue? or a cluster issue?

  • James Cooper
    James Cooper Mar 26, 2014

    Ive got a 98 Silverado 350 with 109k miles. My truck is doing the same thing. p304 code and low oil light coming on when at idle. I replaced fuel pump, plugs, wires, cap and rotor all in the last six months. Still have the hesitation and poor fuel economy. I'm not sure where else to look.......

  • Anonymous Mar 27, 2014

    oil pressure goes up, oil filter blows and engine knocks

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Hi! The problem you are outlining is very similar to the Rover V8 (Buick engine). We Brit's are used to the low oil pressure when warm. I presume a complete oil change engine flushed with new replacement filter has been carried out? Maybe a top quality synthetic oil with additive may help. You may take it a little further and replace the oil pump with an after market performance up rated one. If you really are worried about low oil pressure damage whilst in low rev's try Molybnenum Disulphide an oil additive which really reduces friction metal to metal wear particulary in the situation you are describing.
That's the best I can suggest at this moment.
Good Luck! and Happy New Year!
Paul 'W'
Onyer~EDson(:0)~[><

Posted on Dec 28, 2008

  • Paul W
    Paul W Dec 29, 2008

    AHA!

    Again a problem I've suffered, Small Block in a G20 Chevrolet WinneBago Sundancer Motorhome. I converted it to run on Lpg and on our 1st outing I nearly had a heart attack, when I started it to leave the campsite Nil oil pressure I immeadiatly shut off the engine. I took the engine cover off and loosened the Oil pressure sensor (Bell Shaped) started it again and oil spewed out so I knew the oil pump was working.

    When I returned home I purchased a Manual oil pressure Gauge (Capilliary tubed) fitted it without a problem and Bingo correct oil pressure at all temperatures.(WinneBago is no longer in our possesion)

    Loks like you may have solved this one yourself, WELL DONE!

    Paul 'W'

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1992 silverado pickup has a problem with the oil pressure Gage on the dash board fluctuate when i put break on or accelerate the gas 

Posted on Feb 14, 2009

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