My 84 944 has developed a problem I cannot locate. After driving at highway speeds for about a half hour and I come to a stop the car will die and not idle. If I resume the highway speeds for another half hour or so it starts to cut out badly especially under load at lower RPMs. If I let it sit for an hour everything is fine except that the idle will surge from around 800-1200. After another half hour or so it again starts to cut out. It is intermittant in that it only happens maybe 20-30% of the time. The car has 75,000 miles on it and I have replaced most of the parts to include a new Lindsey fuel pressure regulator, injectors, fuel filter, etc. The only thing I have not replaced recently is the fuel pump. The car sat in our barn for 5 years before I started redoing it and I did replace the pump then. That was maybe 6 years ago. I am ordering a new high output pump as it will be required for the Supercharger that I will be doing over the Winter.
It had the problem prior to the MAF conversion. Any help or ideas will be greatly appreciated.
Steve