Not Ranked
I missed the post about calling quickfuel.......
I do not think changing the main jets is the issue as the mains are not flowing at idle / coasting.
Your idle feed restrictors (ifr's), idle air bleeds and idle mixture screws control idle and coasting.
I do believe that it is a lean condition and could be fixed by adjusting the idle mixture screws counter clockwise to richin the circuit where the condition you discribe is occuring.
Check the items that were discussed earlier and report back.
Just so you know, I have the same BDR and Roush 342R that you have. I have a quickfuel Q-650 and a wideband. I have spent the last year learning a lot about carbs and tuning every circuit of my carb to run perfect.
Tom
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