Thank you for the response.
I'm going to start with the OVP and also the Oxygen sensor. I'm HOPING it's not the converter as I've noticed a foul smell twice this week after it's parked. Maybe the O2 would make it do that (I can always hope).
I guess I have decided to keep the gas car and attempt to sell the diesel. It is almost showroom in appearance and running condition. Maybe there will be a market for it.