high idle and hanging rpms

[justa2v]

I finally got the engine in my car and I'm having high/ hanging idle issues. Its a 99 gt with 2.1 KB, 36lb injectors, 75mm tb, 90mm maf, 255lph fuel pump with KB boost a pump, manual transmission, doesn't have cats and I have the mil eliminator a for the rear o2s. I cant find a vacuum leak anywhere. New iac and pcv. I hooked the scanner up to it and here are some of the readings I wrote down:
IAC DUTY CYCLE=48%
MAF=9.5-9.98(GM/S)1.06-1.1volts
IAT=143°F, 1.14volts
ECT=192°F
O2s11=932mv
O2s21=964mv
One menu said the fuel rail pressure was 37.6psi and another said it was 57psi
What do you think?

 

[justa2v]

O and I also had a guy at the speed shop make me a run tune. He thinks its a vacuum leak

 

[96blak54]

Be sure the throttle butterfly is closing correctly and their are no plug type screws missing allowing air to enter.
Definitely sounds like air freely passing the throttle.

 

[justa2v]

I've tried adjusting it a couple times. Doesnt seem to help

 

[justa2v]

Anyone?

 

[96blak54]

Your second post about a guy making a run tune kinda kills this thread. Go dyno tune it.

 

[justa2v]

Was wanting to break the motor in before I put boost to it