97 Concorde Problems

This is my first post. I've been reading this on this site for about 2 years and got most of my knowledge about how to fix my concorde. I'ts a 97 with 99500 miles on it. I have a miss fire on the 1, 3, and 5 cylinders. I replaced everything that was talked about on this site intake gasket,plugs,wires,cam & crank sensor an the coil. I have a code reader and always try to do the repairs my self. The car runs alittle rough when it's cold better when warm. I'm leaning toward the O2 sensor for that bank. What do you think? Thanks

that's a possibility as well. If one particular bank is failing it could possibly be a faulty PCM, though that's a last-resort-long-shot.

that's a possibility as well. If one particular bank is failing it could possibly be a faulty PCM, though that's a last-resort-long-shot.
Thanks for the reply. So far so good no check engine light for awhile now. I might just take it to the Dealer next time the light comes on. I will post if anything comes up.... Thanks Again

Check engine light came on again. Still a missfire 1,3, and 5 cylinders. Put in new o2 sensor on that side,still no help. A buddy of mine said to clean the battery terminals and to clean the grounds (motor to body grounds on pass. side of engine). They were rusty. Started it this morning 22 degrees outside. Code was only thrown when idiling when cold. Left it idil for 20 min. No code so far. Will let you know if code comes back......

Its mostl likey the upper intake gasket
I have had this diagnosed on my 97 lxi
with just about the same miliage

I already replaced the intake gasket. Next I'm changing the fuel filter & pvc valve. So far car is running better.

Update I found the problem the 2 ground straps on pass. side by front wheel bolted to the frame were rusted. Took bolts off cleaned surface and bolts So far no more problem. Been over a month.