I have a problem, that I have also seen that several others can have as well. 2005 mustang gt with JLT CAI and Bama tune. I have the two codes 171 and 174 that say I am running lean. I have taken the tune off, and reinstalled, and even switched between race and performance tune. I also checked if the CAI was loose, and I tightened it back up. My car seems to be sluggish, it feels like it is going to break down. When I shift to second gear, it feels like the gas is being cut off, and it takes it a moment to get going. My engine seems to not rattle but almost make that sound, like something is broken. Several times when putting it in neutral, my car has died on me on the middle of the road. Other times, the RPMs will bounce from 200 to 1,000. I just need to know what to do. Sorry for the long post if anyone even reads it. I just wanted you to know what is truly happening, and what I tried so far. College student with basically no budget, so when I go for the fix, I'd like to try and do it in one shot. Please help

 

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