can this cause overheating. this is my problem:

I get to the highway and I will get the car to 230, then I coast and the temp goes up a few degrees and starts to go down. then when I put it in gear and step on the gas the temp goes down again to about 190...then bact to 220 in a few min of 70 MPH driving. I know I have bad belts. So can slipping cause the water pump to not flow as well?

--Dan

 

Sounds like your termostat is shot, replace it. Well if your belts are old just get new ones.

 

It's a possibility though I wouldnt rule that out as a solution. Replace the belts anyway and see what happens.

 

i agree that it might be the thermostat .. also double check ur air dam.. it might even be the water pump.. but start simple first