Running Issues SOLVED!!!
Reply #1 –
First, check codes, secondly, remove the TFI module and have it tested. I'd be willing to bet you have a bad one. While you're at it, go to the salvage yard and pull the remote TFI setup from the first Ford product you find with one. Your new TFI will appreciate it.
If the TFI checks out good, then I'd suspect the PIP inside the distributor.
Pulling the codes will take all the guess work out of it, so pull the codes first.