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The oil pressure guage in my 78 decided to stop working. It just sits way up past the "80" in about the 3 oclock position. Could it be the gauge? the sender unit thingy? or something between them? It started acting up after I changed the oil or at least that's when I noticed it. Oil level is good and car runs fine. Any ideas on what to check out first before I spend money on a part that I may not need.
Thanks, Jeff
Thanks, Jeff
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Send PMManteca, CA - USA
Joined: 11/20/2005
Posts: 3623
Vette(s): 1978,two tone,Metalic Rootbeer & gold
1975 L48 4 speed
They must not be a hearty breed Jeff. Both my '78s are messed up too.Well,..... rather than speculate, pardon me if I hang out here with ya and wait for and educated response 
. I hate to learn by process of elimination.
. I hate to learn by process of elimination.Jimmy B.
Just can't wait to get on the road again. 
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Make sure the wire didn't unhook from the sender. If it's grounding out you might get a false reading. Otherwise, the sending unit is the cheapest and easiest to replace first....
Lifetime Member #73
The Money Pit.... and my niece 
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Listen to Jim 
Lifetime Member #116
Dave's '82 
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Is the sender that little thing on top behind the carb? Looks like it has a little rubber tube coming out one side. Or should I be looking elsewhere for something with a wire?
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It's the thing sticking out right above the oil filter. Kinda bell shaped.
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Former Member
Send PMManteca, CA - USA
Joined: 11/20/2005
Posts: 3623
Vette(s): 1978,two tone,Metalic Rootbeer & gold
1975 L48 4 speed
Yep, that should be the pressure sender and the temp. sensor should be on the Passenger side with a wire going up to it from the starter area. aceinthehole 2007-05-29 14:12:41
Jimmy B.
Just can't wait to get on the road again.
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Found it and checked the wire, looks like a good connection. Is the sender a local friendly Chevy dealer, or Napa item?
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
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If you disconnect the sender, does the gauge go down?
If you ground the wire to the sensor, does the gauge peg out?
If both of these "tests" make the gauge peg in both directions, then the gauge and wiring itself is probably OK, and you need a sender...and yes, you can get one at yer local NAPA, or Chebby dealer.
If you ground the wire to the sensor, does the gauge peg out?
If both of these "tests" make the gauge peg in both directions, then the gauge and wiring itself is probably OK, and you need a sender...and yes, you can get one at yer local NAPA, or Chebby dealer.
Joel Adams
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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Eckler's will rebuild your guage if you take it out and send it to them. I don't know the cost. Gene
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