rpms come down slow

put the car around the neighbor hood blms are now at 140. The 02 sensor is a delco when unplugged the cc goes to 90 and stays there is that normal? the iac are still high also
 
af 06-07
L8 39-42
bat 14.3
int 128
bl 140
mph 00
clt 164
ats 54
r 700 to 900
tps .44
iac 74
cc 8-234
nal 00
02 480 to 523
 
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