1991 Convertible - Oil Temp Sensor Problems
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3rd Gear
Joined: Dec 2002
Posts: 3
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From: Kensington CT
1991 Convertible - Oil Temp Sensor Problems
OK -- Who can solve this mystery? Went to the GM Manual, replaced oil temp sensor, checked circuits according to manual. All is OK. Grounded out Oil Temp Gage and it works too...pins all the way up to 320. Checked continuity on connector (3 spade tip) as well. All is OK. Gage never goes anywhere even after running for 1/2 hour. WTF??? :smash: :smash: I'm sure the old sensor was good too!
Safety Car
Joined: Nov 2001
Posts: 3,753
Likes: 191
From: Orange County California
Re: 1991 Convertible - Oil Temp Sensor Problems (Tony Franco)
i have a 91 vert too and my temp needle barely ever moves either. My oil pressure needale also is pinned to the max 90 % of the time and flutters the rest. There is a TSB out on this. It's not important to me so i just leave it be.
Advanced
Joined: Feb 2003
Posts: 57
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From: Westfield NJ
Re: 1991 Convertible - Oil Temp Sensor Problems (Tony Franco)
Gotta tellya. I was getting ready to tackle the same thing! 91 vert and the darn thing doesn't seem to move. What's up with that? :confused: :steering:
Team Owner
Joined: Dec 2000
Posts: 90,675
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From: SE NY
Cruise-In II Veteran
Re: 1991 Convertible - Oil Temp Sensor Problems (Tony Franco)
The oil temp sw is just a thermister like the coolant temp sw.
If the +5Vdc and ground are good and connecting the feedback pin to either ground or +5Vdc pegs the reading the connection to the ECM is OK, so the problem must be in the sensor.
If the +5Vdc and ground are good and connecting the feedback pin to either ground or +5Vdc pegs the reading the connection to the ECM is OK, so the problem must be in the sensor.
Safety Car
Joined: Nov 2001
Posts: 3,753
Likes: 191
From: Orange County California
Re: 1991 Convertible - Oil Temp Sensor Problems (65Z01)
I've replaced the sensor and nothing changed. I dont even think about it anymore. Just make sure you are changing the oil as required and that it is at the right fill level. If a real problem develops it will show up in the collant temp first anyway. At this point i don't even notice mine and my engine runs like new and used no oil between changes.
