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- 02 1500 4x4, mp3
switched out msp ecu to mp3 to keep from getting CEL. as soon as i hit boost goes lean into 15 and 16. now shouldnt the SS keep it from going lean? running supermap tune.
o i didnt realize you had the ftc. yea you can pull timing with that. just make sure you pull a good amount. id start around 1 psi and pull like 7 or 8 in the cells on map b to be conservative and safe.
when did you get a blinking cel, after the mp3 ecu? that usually means your causing serious engine damage.