2001 Focus Stalls When Idling And Hesitates On Accelleration

Posted in Ignition Systems
  • I have a 2001 Ford Focus with 150,000 miles. I have replaced the fuel pump, fuel filter, spark plugs and wires, pvc valve, air filter, changed the oil, bought a new MAF sensor and the car still runs like crap. I had the check engine light code read at auto zone and it read; P0102 – - low voltage / low frequency to Mass Airflow Sensor. The car will idle and run normal about half the time. But the other half of the time I have to hold the brake with one foot and keep my other foot on the gas pedal just to keep it from stalling. Then when I go to take off at the light it will hesitate extremely bad for about 5-10 seconds before it will take off. Car runs and drives fine when out on the highway.
    I don’t know if this makes a difference but the cooling fan seems to kick on a lot (car does not overheat). Whenever the fan kicks on or A/C compressor is running the car runs worse. Any ideas???

    There are 3 Answers for "2001 Focus Stalls When Idling And Hesitates On Accelleration"

    1. carparts21 says:

      First thing is to change gas filter, Second take a look at the idle control switch , That will cause ruff idling stalls and engine turn off, hope this helps,

    2. carparts21 says:

      i had the same problem with my olds it was the coil packs

    3. carparts21 says:

      My 1995 Cadillac did the same thing as your car – it was a bad EGR (Exhaust Gas Recirculation) valve. I would recommend replacing with one from a recycling yard; that way, if it does not solve the problem, you have not spent a lot of money. My guess is that this will cost you ~$30 used.