I've ran my car on autotap a few times and found out that my timing is horrible (maxed out at 19 degrees timing advance at full throttle in cold weather). I changed the spark plugs 4000 miles ago so that's not the problem. I'm about to bring my car to the dealership and have them reflash the PCM with a new program. Is there anything else that you would check before doing that??

 

TTT, any ideas?? any help?? I want to leave the reflashng of the PCM as last resort.