I'll start off by saying i have used the search and read everything related but no one has had this problem that i have read. I have and 89 turbo auto the stock temp gauge stopped working so i installed an aftermarket gauge. I've done a coolant flush and also replaced the t stat and burped all the air out of the system. The problem i'm having is that the car starts to overheat only with the hood closed. I can let it run for about ten min at a raised idle with the hood up and the temp stays within normal operating range but as soon as i close the hood and let it idle the temp starts to rise. I'm thinking it could be the aftermarket gauge itself and where it is located but if you guys have any ideas that would help me out i would greatly appreciate it this is the last hurdle i have to get over before the car is able to be drivin daily. Thanks guys.