It has, to me, all the indications of a fuel delivery problem. I don’t discount the idea that there might be particulate in the fuel lines, since I didn’t watch the fuel filter by the pump on the highway. I hope to hear from the shop in a day or two as to whether or not they have looked at the fuel filters. I didn’t check yesterday as I was just interested in getting the car to the shop.
I did put in a brand new pump from Sunbeam Specialties, and this was the first item replaced, they put in a Bosch of some sort I believe.
Step one would seem to be getting a fuel pressure gauge & sending unit to measure the pressure at high RPMs. Constant pressure isn’t a guarantee of fuel flow in terms of volume, but it’s the easiest variable to monitor right now I’d think.
Keep those suggestions coming…