I am trying to figure out what's wrong with 87 Samurai. When starting cold,shift 1st gear or going reverse then when I stopped or just sitting to idle, engine dies out. It does this several times on every stops until engine gets warmed up for at least 15-20 mins running then it don't die out. Mechanical fuel pump is pumping, depress with finger on EGR valve seemed fine, fresh gas tank is full. What do you suggest I need to look for to solve this issue?