1996 Jeep Cherokee stalling

Well hears the situation. The jeep runs fine starts fine the problem is while shifting into drive it just dies it it don't do it in reverse up hill or down but seems to do it more while trying to go up hill in drive. I have already checked the fuel pressure, fuel filter went all over the vac lines and there all good almost seems like an electrical prob. Oh and one more thing when you do get it in drive an get going it always stalls (same way no spitting and sputtering) when you hit the breaks hard but if you ease on them it dont always stall