back with new problem on 90 camaro 3.1 v-6

[cocobolo95]

When my assistant sprays gas in tb, and I open throttle, tps gives smooth change in open %, map reading change with change in throttle position also. What doesn't change is injector pulse width. And 3 different ecm's show same symptoms.

Checked iac counts, around 30 at idle, increasing a little as throttle opens then drops down in counts when throttle opens wider. Goes back up in counts when throttle closes.