Hey @dreadmyst06 welcome to the forum! Congrats on your 1995 Integra!
With the temperature gauge have you checked to see if the thermostat is ok?
For scanning the engine codes there are OBD1 to OBD2 adaptors you can get that are handy.
With the temperature gauge have you checked to see if the thermostat is ok?
For scanning the engine codes there are OBD1 to OBD2 adaptors you can get that are handy.

Amazon.com: Keenso OBD1 12 Pins to OBD2 16 Pins Scanner Diagnostic Tool OBD II Adapter Cable Connector for GM : Automotive
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