04 Lincoln ls 3.0 had trouble codes indicating miss fire on several cly. have changed all cop pcv valve and sleeve o rings plenum gaskets and just about every thing but intake gaskets. light went out for 30 miles,.came back on today with,po301 316 304 p 2195 2197. in the middle of this had a code about the cat. conv. that never come back on. im kinda lost, as to what to do next .
Jan 4, 2014 at 1:00 PM