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I just installed the Full-Race ProStock catted on my 2018 and I wasn't getting any codes for the first week, but yesterday morning I got a P0174 "system too lean" and the infamous P0420/430 which I'm thinking it's because of the first code. I believe the codes only happen when I floor it in 10th and it downshifts. I think my tune needs to be adjusted.
 

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Registered
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4,803 Posts
I just installed the Full-Race ProStock catted on my 2018 and I wasn't getting any codes for the first week, but yesterday morning I got a P0174 "system too lean" and the infamous P0420/430 which I'm thinking it's because of the first code. I believe the codes only happen when I floor it in 10th and it downshifts. I think my tune needs to be adjusted.


Ditto.
 
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