it's like this. my rpm is at 750-800 when i'm done warming up, then i goto school which is like 15-20 miles away(have to take the interstate). when i arrive at school my car is idleing at around 1500. and another thing from some wierd reason when i leave my car to idle long enought the temp. guage goes up really high for some reason. help me if u can i have a 95 LS stock for now.

 

Where's the problem?