When I first start the car it runs rough and will idle down and stall. Once it smooths out it is OK in park or neutral but stalls as soon as I put it in gear. Once warmed up, I can get it in gear and moving but it hesitates badly and stalls frequently. If I can feather the gas enough to build up a little speed and RPM it will suddenly take off and run fine at highway speed. If I slow down with out keeping the RPM's up, it will start to hesitate again and may stall. If I can ride the brake and keep gas to it with RPM's up it will stay running and go.
When it is very hot, like say driving 50 miles on the highway and then stopping for 5 to 10 minutes, it will turn over but not fire. It has to sit and cool substantially before starting again. Once started I am back to the same running problem described above. Any ideas will be appreciated and pursued. Thanks.