I've done my share of searching forums but not much luck. My car is at 125,000 miles, owned it about 8 months, chipped it with a United Motorsports stage 1, Catback, boost gauge and a bailey's DV, to give some background.

I went to drive it this afternoon, gave it a quick pull and everything seemed fine. Then a minute later I was driving and gave it a little gas to accelerate normally and felt a bit of a sputter, and immediately had a big loss of power, shaking, and an altered exhaust sound. It's running very rough. It shakes at idle and worse during ANY acceleration. Barely any power and a sputter when accelerating. A throatier or more gurgly exhaust sound (normaly I'd be cool with that).

The only time it sounds/feels fine is when I'm moving, but off the gas and decelerating. Plus it's NOT THROWING ANY CODES (yet). I couldn't find anything by looking and feeling, but vacuum leak maybe? I literally just graduated college today and really don't wanna have to spend big $$ just to have a shop try to diagnose it, so any input would be much appreciated.

 

Check your down pipe from turbo, not long ago mine completely snapped near the bottom, exhaust sound was very loud and quite a lot of power loss.

 

Thanks, I'll check it out when I look at it today. I'm going to rent a scanning tool too even though no CEL is showing up and hopefully it will help pinpoint what's up.

 

Got it figured out for anyone who has a similar problem in the future. Just a bad coil so I was running on 3 cylinders. If your car ever has symptoms like mine just unplug the coil wires one by one, and if the car doesn't seem any different after unplugging one then you know which one is bad. You'll definitely notice the difference if you unplug one that works.

 

I also threw no codes which I thought was weird.