I have a 2004 gt that has also developed a rough idle also and can't find the problem.... I wish you had the answer....
The 2004 Ford Mustang has 12 valves.
The 2004 Ford Mustang has a V6 engine.
yes, 1994 -- 2014 would fit, all are the same pattern !
The 2004 Ford Mustang is a gas-powered vehicle.
The 2004 Ford Mustang has overhead valves (OHV).
The 2004 Ford Mustang has a 5-speed manual.
The 2004 Ford Mustang is 15 ft. 3.2 in. (183.2 in.) long.
The 2004 Ford Mustang's turning circle is 37.1 ft..
The height of the 2004 Ford Mustang is 4 ft. 5.1 in. (53.1 in.).
The curb weight of the 2004 Ford Mustang is 3290 lbs..
The 2004 Ford Mustang runs on regular unleaded.
Well the prices will very depending if you want the gt, the v8, or if you would just like the v6 mustang. for a 2004 mustang gt with lower miles its about 12,999 (with about 45,000 miles). For a v6 however it will be lower, about 9,999.