This is my first PSD. I have added an AFE intake and 3" DP. The warm up valve seems to operating more since the DP install. Is this related to the DP or the intake? Do I need to change anything?

It runs fine after a legnthy warm up. I get heat in the cab way before the valve settles out.

Thanks for looking.

maybe it is because with the larger down pipe, the backpressure valve is not as efficient. That would be my non-professional guess anyway.