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You started another thread asking about fuel pressures.
Your pressures seem fine.
For my ROW 2.5 the vacuum line from fuel pressure regulator goes straight to driver side intake manifold.
You mentioned BB Performance intake which I couldn't find. Could you post a link to it.
Did the problem perhaps start right after you installed it?
I do not believe durametric will help you in any meaningful way compared to generic OBD2 adapter.
I might be wrong but your ltft's are that negative and I assume your Fuel pressure doesn't drop when engine is off.
My guess would be it's MAF related.
What does your MAF read idling with AC on and off?
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