Tweecer help. Car wont run right with the stock tune loaded.

bjl95mustang

Founding Member
Jan 18, 2000
1,495
0
36
Austin,TX
When I have the stock tune loaded to switch pos 1 my idle rpms bounce around about 500 rpms. when I put the switch into pos 5 (tune off) it runs just fine. I did read eec then when I got those values I clicked write tweecer and then when I start my car the idle is all crazy. I have it set to 4 2 banks and on bank counts 1-4 I have it set on 1. What am i doing wrong? I have checked and cleaned all of the connections.

Thanks,
Brandon