Originally Posted by 94FormulaV8
I just bought the car tonight, and the Temperature Gauge keeps going up and down a lot like it is overheating.
When I drive it goes to around 210, then when I am at a stop it goes way over 210, then once I start driving again it goes back down again really quick.
The low coolant light is on too, but it looks full.
The low coolant light being on when the radiator is full is a common problem - you are checking the level in the fill neck of the radiator, and it is full to the very top, correct?
The coolant level switch cruds up. Sometimes it can be cleaned, but often it's an internal leak in the switch and the coolant has corroded the circuit board. In that case, it requires replacement.
Define "it goes way over 210". What temperature does it go to? The first fan (or both fans on low - depends whether you have an "early" of a "late" model 94) goes on at 226*F, the second fan (or both on high speed) at 235*F.
Since your car is new to you, I would totally flush the cooling system and the heater core, and check to insure the engine has the correct LT1 thermostat. You can't use a generic t'stat for a Gen 1 SBC.
Since you already have the link to Shoebox's site, be sure to make maximum use of the numerous tech articles related to the cooling system. The LT1's unique "reverse flow" cooling system (at least the way they set it up in the F-Body cars) can be problematic, but when it works correctly, it's allowing then engine to run maximum spark advance, and make maximum power.