1990 plymouth grand voyager question

San Diego CA

Description

Hi there, So I have a 1990 plymouth grand voyager who's check engine light keeps coming on. I've replaced the ecm and ignition coils but it's still misfiring. Has anyone had this problem or kno we how to fix it? Or foes anyone know someone who used to work on these vans back in the day who can help me out, because my mechanic can't figure it out. Thank you