ive been running my car on a tune for 4 years... if i put it back to stock tune, the car wont start...

 

Well after a week of frustration with this tune now its gotten worse. Riding down the highway I feel the car lose power and start to have a hollow funny sound, no throttle response. Its like the car is getting the air with no fuel. Ride with it in neutral for a mile or so and it clears up. Get in traffic and the car does the same thing but even worse. Popping thru the intake, no throttle. Reminds me of a carbed car in the past that was getting air but no fuel due to a bad fuel pump. I get the car home, mad as hell and let it sit for awhile. Wondering if I had done any damage I put the car back to the stock tune-reinstall the mil eliminators on the rear o2 sensors and put the air restricter back in the cold air kit. Just like it was before I spent $400 on a tuner and custom tune. Car fires up perfect, perfect idle and runs great. Drove it on the highway and in city traffic. Now I have a pretty paper weight. Brenspeed said they would send me a different tune but why am I having such a hard time with this. Confused and a little frustrated to say the least.