Over the summer I had problems with stalling in my 87 240 DL. I tried a bunch of things to fix it. My fuel pump relay was good, I put in injector cleaner, checked the plugs, nothing. It was still stalling when I came to stop, it would start right back up 99% of the time, but it was annoying/dangerous nonetheless. Finally, at the suggestion of a Brickboatd.com member, I checked the fuel pressure regulator (pull off vacuum hose and smell for gas), sure enough, I smelled gas, and replaced the FPR. This is about a $40 part and solved the problem, it hasn't stalled since except in extreme cold just after startup. I hope my experiences help some people out there with this problem.