why would a ford explorer run rough after unhitching the battery and the service engine soon light come on?
i have a 2004 ford explorer 4.0 and i went to start it and it wouldn't start. so i changed the
fuel filter and unplugged the battery; then i plugged the battery back in; and it wouldn't
start. i finally got it to start; but it's running rough. the only way i can get it to idle is by
holding down the gas pedal. or it will just die. after i unhitched the battery and plugged it
back in; the service engine soon light came on. can anyone please tell me why this is.