1999 Blazer rough Idle

We just bought a 1999 blazer, it idles rough in drive and park. The plugs, wires, cap and rotor have been replace that helped alot, but it idles rough enough i can feel it in the cab!

I checked the fuel pressure and it does not bleed off, i cleaned the egr and iacv, fuel and air flters are pretty new.

Cruising down the road she runs just fine plenty of ump!

What should i look into next?