I have a 1997 chrysler LHS and cant seem to get the air out of the motor and when i finally do get heat back in the car the heat gauge will go to H then cool back down when i pull over any one know what the couse is

You probably have air in your cooling system. Some cooling system even have a means of burping or bleeding air off. With a cold engine remove the radiator cap. Have a 50/50 mixture of antifreeze and water available. Start car. slowly add the coolant mixture until the radiator is filled. wait and watch. if the coolant drops add more. you need the thermostat to open (to fully clear the system of air) which means you need the engine to come up to normal operating temp.