Have a 2002 concorde that runs sluggish on startup it also backfires after a few minutes it runs fine. I keep getting 02 sensor codes. To date I replaced all of the spark plugs and the O2 sensors but still have the same problem. The ECM then read faulty transmission speed sensor so I had this replaced and still have the same problem. My mech replaced the ECM thinking that it has a loop problem but it still has the same problem. Not sure what to do from here on out
have the same problem?
Monday, April 11th, 2011 AT 3:36 PM