zedzed, how bad is the stumble? I have the same set-up, but only have a few miles on it. The only time i had an issue, so far, was pulling the car out of the garage for a few pics with way less than a 1/4 tank. I have a a few hills in the yard and it stalled out at a very steep angle, sideways.
I know your car has been on the road for quite a while . Please advice on how serious this is. Thanks, David