Got a call today while my girlfriend was on her way home from school, and its acting funny again (a hyundia running bad? )

1. It seems like when you press on her brakes there is no resistance and it does not brake as easily as it used to.

2. When idling her rpm'* are higher than usual.

3. When driving car hesitates to shift and then jerks into the next gear (maybe a sensor?)

If anyone has ideas they would be appreciated

Did all these problems pop up at the same time?

The shifting problem has been there for a few days, the rest just started this afternoon

What yeat?? My dad had a '02 Optima V6.

pretty sure its an '00

ummm optima is a kia.....

Same body, engine and trans, toasty. Optima got exterior changes.

MN, does it have the 2.5 V6, or the 4 cyl?

its got the 2.5

Ok, check the brake booster hose. It may have cracks in it, my dad'* Optima had a small crack in his and it caused some oddball problems like high idle and sometimes surging idle. Did she recently have a tuneup on it? If so, when they removed the upper plenum, it'* possible that they reused the old plenum gasket.

do you know where the brake booster hose is located?