97grandam w/history coilhousing problems.runs...

Question

trouble codes 1) po300-random/multi cylinder misfires; 2) po440-evap emission control system malfunction; .3) po502-vehical speed sensor A circuit low input... Replaced housing but not coils themselves.. boots not changed but looked fine.. plugs new.. Still runs rough, fan always on even when just started, idles low then sometimes high. engine temperature light never gets to previous temp levels. could this be a ignition coil problem as usual or maybe a sensor problem? I dont have many tools or the knowledge to do alot of testing.