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Topic: Oil pressure guage

in Forum: C3 Electrical


Oil pressure guage

Posted: 1/31/06 10:30am Message 1 of 7
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Savannah, GA - USA
Joined: 1/20/2005
Posts: 936
Vette(s): 1982CE,32,000 and counting. (fast!!) 1981 Vette, black on black. ZZ4 (quick!!)
Not sure where to post this.My guage is going crazy on me.Sometimes it works right and then it goes way past the 90 psi.Are the guages on an 82 electrical or do they have a tube going to a senser or an oil connection.Is this very hadr to fix.Thanks.


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Oil pressure guage

Posted: 1/31/06 1:33pm Message 2 of 7
Former Member
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Savannah, GA - USA
Joined: 1/20/2005
Posts: 936
Vette(s): 1982CE,32,000 and counting. (fast!!) 1981 Vette, black on black. ZZ4 (quick!!)
Thanks.pumps.Where is it grounded?I suppose under the dash!


Oil pressure guage

Posted: 2/3/06 8:53am Message 3 of 7
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Mason, MI - USA
Joined: 11/27/2005
Posts: 95
Vette(s): 1982 Charcoal Coupe, 1993 Bright Aqua Metallic Coupe, 2004 LeMans Blue Commemorative Edition Coupe
Just Lurking. I have an 82 and the guage hardly comes off zero. Scarey, but temporary mechanical guage shows ok pressure. Don't know where to look at the moment.


Oil pressure guage

Posted: 2/3/06 12:04pm Message 4 of 7
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Virginia City, NV - USA
Joined: 1/19/2005
Posts: 314
Vette(s): 1979 Coupe, white in color

Actually I put my keyboard in motion before I put the mind in gear. The gauge is wired as follows on a '79. There is a power wire coming from the fuse panel going to the center cluster that powers all the gauges. The ground part comes in from the sender. The whole center gauge cluster has a printed circuit board to distribute power and ground. When I changed my radio from stock to a din type I recall having to take care when putting the cluster back in. As the oil pressure rises and lowers, it varies the electrical ground potential to the gauge via it's connection to the block where it is grounded. So this puts a lot of possibilites in it. Sender, circuit board, gauge, could be any one of these. I think the first thing I would try is the sender, cause it's the simple to get at and change. Then from there you may have to pull out the center cluster, check the connection from the harness, the circuit board for any breaks or suspect the gauge itself. Sorry for the quick answer before, but I think the sender may be the fly in the ointment.

Dave 




Oil pressure guage

Posted: 2/3/06 2:55pm Message 5 of 7
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PERRYSBURG, OH - USA
Joined: 4/23/2004
Posts: 317
Vette(s): 1975 T-Tops,Lite Custom work,Many engine mod. 700R4 trans. body is shaved,17" wheels bf goodrich g-force tires,heavy sway bars front&rear rack&pinion steering,550 slolom springs with gas shocks.
My gage was crazy when I first started messing with my 75. I changed the sender at the block and put a new electrical connector on the wire and this made the fix. Remove the passenger side panal on the center counsel and you should be able to see if the ground wire is connected to the back of the gage. It would be a start?


Oil pressure guage

Posted: 2/4/06 6:48pm Message 6 of 7
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CUYAHOGA FALLS, OH - USA
Joined: 12/2/2003
Posts: 6424
Vette(s): 1975 C3 Red, T-Tops, Black Interior. All I need is time and money! Getting there!
Granted, there are many possibilities in old cars.  But Chevrolet did have a problem with oil pressure sending units.


Oil pressure guage

Posted: 2/12/06 12:43pm Message 7 of 7
Former Member
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Savannah, GA - USA
Joined: 1/20/2005
Posts: 936
Vette(s): 1982CE,32,000 and counting. (fast!!) 1981 Vette, black on black. ZZ4 (quick!!)
Thanks guys.I'll check the sender first.


in Forum: C3 Electrical


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