I have a 97 power stroke that I bought about a month ago and I’m having problems when I first start up it will surge a couple of time then idle normal or sometimes it will start up just fine. I’ve replaced the lift pump, all hoses from the lift pump, both gas tanks, the filters in the tank...

Here's the problem. When I drive and take off power (let up on the accelerator), sometimes I get a check engine light and a complete loss of power. The engine runs but will not rev. That lasts anywhere from about a few seconds to 30 seconds. Then power returns and everything is good. I have...