I get fuel cell 2 and 1 easily enough. 2 comes in with very light throttle (cruising), 1 for decel, and 4 comes in with moderate acceleration (over 5-6% TP) all the way to WOT. Never a cell 3. I do have PE as my LTFTs and STFTs go to 0 right at 30% TP just like the bin file is set.

I searched on the Powrtuner forums and found some posts that at some point it would seem that cell 3 became exclusive to boosted applications. A SS M90 kit member who still has the L36 MAP says he has never seen cell 3 on his car (2002 Imp LS). Nor on any other L36 that he has gotten his hands on.

So, it would seem that it is normal.

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2004 Impala LS - got some mods
NAIOA Moderator

Making you think twice before picking on Impalas