Oil pressure gauge not working.
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Joined: Aug 2018
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Oil pressure gauge not working.
I have a 1984 TA with a LG4 5.0L. The oil pressure gauge is stuck at 50psi whether the engine is running or not. It has a large can 3 wire oil pressure sender. Is there a way to tell if it’s the sender that’s bad or the gauge? I know I can just try a different sender but they are $50-60 and I’d rather not waste the money if I don’t have to unless someone knows where to buy one for a reasonable price. I know I can put a second gauge on but I’d like to get the original to work. Any help appreciated. Thank you!
Supreme Member
Joined: Oct 2004
Posts: 4,528
Likes: 240
From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Oil pressure gauge not working.
the gauges rarely go bad it is a safe bet to replace the sender I believe this is the right one but double check about $30 on ebay
https://www.ebay.com/sch/i.html?_fro..._oac=1&_sop=15
https://www.ebay.com/sch/i.html?_fro..._oac=1&_sop=15
Joined: Sep 1999
Posts: 4,353
Likes: 308
From: NJ
Car: 92 Firebird
Engine: 4.8 LR4
Transmission: T56
Axle/Gears: 3.45 9 Bolt
Re: Oil pressure gauge not working.
Is it on 50 even when the ignition is off? If so it is likely the gauge. If it is only when the ignition is on, it is likely the sender. You can get on Rock Auto
https://www.rockauto.com/en/catalog/...+/+switch,4588
https://www.rockauto.com/en/catalog/...+/+switch,4588
Thread Starter
Junior Member
Joined: Aug 2018
Posts: 17
Likes: 0
Re: Oil pressure gauge not working.
Is it on 50 even when the ignition is off? If so it is likely the gauge. If it is only when the ignition is on, it is likely the sender. You can get on Rock Auto
https://www.rockauto.com/en/catalog/...+/+switch,4588
https://www.rockauto.com/en/catalog/...+/+switch,4588
Thanks
Joined: Sep 1999
Posts: 4,353
Likes: 308
From: NJ
Car: 92 Firebird
Engine: 4.8 LR4
Transmission: T56
Axle/Gears: 3.45 9 Bolt
Re: Oil pressure gauge not working.
You could take the cluster lens off and see if the needle is just stuck. You'll likely need to swap out the gauge it's self though. It's not very difficult
Thread Starter
Junior Member
Joined: Aug 2018
Posts: 17
Likes: 0
Re: Oil pressure gauge not working.
The needle was moving around last night when it was running. It didn't seem like it was really reading anything though. I didn't get a chance to unhook it and see what happens. My choke light was on bright and the idle was a lot faster then normal so I guess I need an alternator too from what I've read.
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