OZ,

If they don't get it done today, I am going to bring the car back home and I will try your suggestions. I asked them to verify the coil packs and check the plugs, they might attempt it today.

Thanks for your suggestions and help...I can't believe how frustrating this is getting. I have always been able to work on my own cars, this one is a bit different.

M.B. DOC...I forgot to mention that they did check the pressure regulator and it had no leaks.