Sounds like a combustion issue I recently had on a 2000 Focus V4 hatchback. Try replacing the air filter, and fuel filter, then maybe a basic Tune-up, before doing any expensive diagnostics. Like catalytic converter testing.
Dirty fuel filter??
The 2004 Ford Focus has 16 valves.
A very dirty fuel filter could do that.
who is the location of the fuse box of ford focus 2004? fuse box ford focus 2004 location
why 2003 ford focus stall when air conditioner is turned on
The 2004 Ford Focus is a gas-powered vehicle.
The 2004 Ford Focus has an inline 4 engine.
The 2004 Ford Focus has a 5-speed manual.
The 2004 Ford Focus is 5 ft. 6.9 in. (66.9 in.) wide.
The 2004 Ford Focus runs on regular unleaded.
The height of the 2004 Ford Focus is 4 ft. 8.3 in. (56.3 in.).
The 2004 Ford Focus has double overhead cam (DOHC).