May need plugs and plug wires, may have a dirty fuel filter, injectors probably need cleaning by a mechanic (such as PrecisionTune). If you install new plugs, DO NOT GAP THEM! They are factory set. You will ruin the platinum coating with a feeler gauge.
To change the alternator on a 2002 Ford Focus, first disconnect the negative battery terminal to ensure safety. Remove the serpentine belt by loosening the tensioner, then unbolt the alternator from its mounting bracket. Disconnect the wiring harness and remove the alternator, then install the new one by reversing the steps—reattach the wiring, secure the alternator with bolts, and reinstall the serpentine belt before reconnecting the battery. Finally, start the engine to ensure the new alternator is functioning properly.
how do i change the alternator in my 2001 ford focus?
From the inside.
Go to http://www.focushacks.com/index.php?modid=45
yes
You need a set of Torx
How to remove alternator on 2001 ford escape 4 cylinder
The 2002 Ford Focus has 16 valves.
It is located directly below the alternator on the right (passenger) side of the engine.
You'll probably have to jack it up, take a wheel off, and remove the splash pans.
You have to remove the brake master cylinder and remove alternator through there.
What type of battery do i need for a 2002 ford focus