most likely you have a missfire.
ford focus stalling at idle but not cutting off the check engine light is on please help so i dont get rip off thanks
throttle body or idle air control value
most 2000 model year focus have a fuel delivery module recall.
vaccum leak
car run good but has a little vibration idle or running
Depends most common on older models is rough idle and or suspension starting to go.
Possibly an umbrella wrapped around the flywheel?
What causes back firing on a ford explorer and it to idle rough and want to cut out when you try to give it gas.
there is an idle control on these cars, could also be a problem with your intake, and idle. that's what was wrong with my 2000 focus. i lowered the idle, and changed the air filter.
I am answering my own question..LOL there is a recall on 2000-2001 Ford focus's involving a loosing Torque bolt on the front suspension causing noise, vibration and sometimes ball joint separating. Thankfully we just have noise and vibration but that's bad enough when it's your daughters car!
ford suck. go Chevy