Would a loose ground wire on a car make it quit while driving or randomly not start.?

My 1995 ford bronco will randomly stop while driving and I have to wait for it to restart. It will also randomly not start when I go to get in it and after it sits it will start. I know its not over heating, i have had the fuel pump changed, coil changed, ignition module, etc. It is still doing the same thing. I have drove it a ton of miles and then it started again. Would a loose ground cause this? A friend of mine said he had the same issue with his and the loose ground was the problem.