VX SS 5.7L High Idle on cold start only 1.9k to 2.0k rpm !!

[Demonrt8]

2002 VX SS Commodore ls1
High idle on morning start ups only from 1900rpm to 2200 rpm range if i pressed the accelerator rev. won’t come back fast enough it hangs there for about 5 sec. Then drops to 2k again .. then when it reaches half warm temp. It stalls and reads 200 to 250 Rpm idles rough and poor then dies .. after several cold stop starts temp. Gets to normal then car acts smooth idles perfect like there is nothing wrong with it and rides perfectly !!
No error codes or cels !
Checked and changed 2 Mafs , 2 IAC’s , IAT checked , No Vacuum leaks , Cleaned TB , TPS readings ok .. 0 with no press 100% full press .. checked wires loom and they are ok .. still the problem remains on cold starts it idles very high then stalls after 5 mins. Then it idles normally ..
What am i missing to check .. ?

 

[lout]

monitor your coolant temp sensor from cold to warmup
what are fuel trims at idle
try blocking purge solenoid off

 

[Demonrt8]

monitor your coolant temp sensor from cold to warmup
what are fuel trims at idle
try blocking purge solenoid off

Tried to block purge solenoid off and it acts the same i think i will change the temp sensor next since i have got one as a spare and try it out next morning .. since when i was reading hidden menu yesterday while fueling up the car .. the coolant readings was 107*c while it was freezing out side and car was up to normal operating temp. And the needle reads before the middle .. so i hope that works ‍

 

[Demonrt8]

Well i monitored my temp. Sensor last night and it reads good .. the problem still there it idles high on cold starts then stalls then after 5 to 6 cycles turning the car in and off till it get to operating temp. It idles perfect with no problems at all !!
What else should i check next ?!
Might be the PCM ?!

 

[lout]

get a quality scan tool and check live data

 

[Demonrt8]

get a quality scan tool and check live data

What should i check for if you can provide me with values or parameters for specific sensors i would be greatful ..

 

[lout]

at cold start
maf at cold start around 7-8 grams
fuel trims +/- 2-3% at idle
fuel trims +/- 2-3% at 2500rpm
requested idle 850
actual idle 850
when warmed up
maf around 6-7 grams
fuel trims +/- 2-3% at idle
fuel trims +/- 2-3% at 2500rpm
requested idle 680
actual idle 680
O2 sensor fluctuating 300 - 700mv

 

[Demonrt8]

When warm ..

 

[Demonrt8]

Warm at idle

 

[lout]

looks you have a large vacuum leak somewhere
long term fuel trims almost maxed out and MAF reading low
did you check LTFT at 2500rpm
edit= just noticed one screen shows maf low and one shows maf correct
need the 2500 rpm to determine if vac leak or fuel delivery problem