Temp. gauge bouncing up and down

[BJBethel]

Something strange started happening tonight in my 95 GT. I warmed the car up (Below 30 up here) and got in and the temp gauge was all the way to H. Started driving and it went down. then it started bouncing around a bit with the air (I had the heater on) blowing hot, then cold, then hot then cold. Any suggestions? I'm thinking thermostat.

Another problem, which I don't think is related. My car, with 193,000, has been surging a bit when I'm driving it. I"m going along fine then it started to bog a bit. It does it real bad when it's cold and hasn't been warmed up. Any suggestions?

 

[PUNISHER RACING]

try the thermostat first its cheapest 195*

 

[HGFireHazard]

It sounds like air is in your cooling system.

 

[BJBethel]

If it's air in the cooling system, do you just flush it?

 

[HGFireHazard]

You can burp the system. While the coolant is cool, remove the radiator cap and start the engine. Allow the car to warm up and you should see bubbles and hear the system burping. If that's your problem you can expect to have a little overflow while it burps, don't worry as this is normal. Just get a couple of rags and put it around the radiator neck.

It can also help if you gently squeeze the upper radiator hose to help facilitate the release of air.

When everything is good to go you should be able to see the coolant running through the radiator and have no more bubbles coming out.

If you're interested in changing/flushing your coolant you can, especially if its a bit aged, but it certainly isn't necessary.

Maybe a bigger question for me is that if it's air in the system, how did it get there? Did you do something recently, change hoses, etc?

 

[BJBethel]

I haven't done anything to it recently. If air is in there I have no idea how it got in there.

I'm hoping this works. If it's not air or the thermostat I have no clue what it could be.