I have a 1989 Ford Bronco with a 351 engine. After I have driven it some miles and then shut it off and come back a few minutes later to start it , it turns over real slow like the battery is low but its not low.I have check to see if it is over heating but the temp is right where it is suppose to be.I put a new starter in it last year so I am wondering if it might be the starter.Can anyone enlighten me on this problem ?It turns over great when it's cold but not after it warms up.