Hey Ive got a 99 V6, its got longtube headers, flowmasters and shorty exhaust. I had a problem today with when itstarted up it would shake and act like its about do die and it kinda has a da da da da sound. I checked my plugs and my #2 cylinder was covered in oil and carbon. i cleaned it along with the others and it still did it. i changed the plug with a new on and no change. Is there something else that could be wrong? I am very inexpirenced in mustangs espically motors withall these computers and censors. Im a mechanical motor guy. If anyone knows anythign that could be wrong please post Thanks.