I have just bought A 87 k5 Blazer and there is a new fuel pump in the tank and all the wires are good not broke or loose,my question is when I put starting fluid in the carb it will try to fire but wont stay running,I was told that it could be a fuel pump relay switch,can someone plz tell me where that is located on my truck and what it looks like,there are 2 relays for that one is square and one is oval,but i dont know where it is located!there is no fuel going to the carb,I have checked my fuses and they are good,plz anyone that can help plz im in need I am so ancy to drive my truck,my name is Ron and you can e-mail me at dolphinman68@centurylink or call me at 360-244-2149,Thankx friends!