Basically, im running a b16a2 with obd1 downgrade, i took off the sensor on top of fuel rail*evap i believe* and let my friend use it to pass smog. so i connected the vaccum nipples with a spare vac line i had, i also changed out the fuel rail to his aem from my stock and it has a fpr. now my car idles around 1900 when it was only 900 before, i checked timing, i checked for vacuum leaks, and i adjusted the iacv to the lowest setting and the lowest i goes is 1900, any ideas guys why it might be idling so high?
thanks in advance