Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › how do i fix low idle on 94 civic ex?plz help! › Re: how do i fix low idle on 94 civic ex?plz help! November 7, 2012 at 9:31 pm #474995 cb7ftwParticipant Need to know a little bit more history about what you did to the car/engine. If you turned your non-vtec into a vtec, you will most likely need to do some stuff to your ECU.