I own a 92 RV on an E350 chassis with a 460. I am having a drivability problem that even the Ford dealer has not been able to solve. First the outside tempature must be above 90 degrees. When I am pulling a grade in second gear around 25 to 35 mph. After a period of time I notice a loss of power and slight missfire. At the top of the grade, the engine will shut down. The engine temp is normal. The engine compartment is warm and it is always hot outside. If I let the unit cool for 30 minutes, It will start and run fine. Once again this only happens when pulling a grade at slower speeds when it is hot outside. Remembering some of the problems with ford ignition problems in the early years, I suspected this was the problem. After a breakdown I have been checking the module which sits in a heat sink on the fender well and it is pretty hot. I took the vehicle into the local ford dealer and he kinda agreed with me. Changed the module and the stator. I was out this weekend going up a 11 mile 7% grade and same problem. Hmmmm. The module is mounted on the left fender well behind one of the batteries. I am now thinking it is not getting enough airflow to cool properly. I think in 93 or so they moved the module to the distributor which would allow airflow from the fan. Maybe this was a fix. I am preparing to relocate the module. Has anyone seen this problem before or any other ideas?