Why would my car be chugging and dying only in drive, not in any other gear?

What is your question?

I can drive in reverse or put it in neutral, but as soon as i put it in drive or 1st or 2nd gear, the car will chug after about 1200 rpm, also, if i stop, then go again the car will chug and die. Also i hooked it up to a device it was talking about, drive-code 26