What A/F ratio (voltage) should be seen at idle?

Mine is currently in the .89-.91 range and it seems to be running rather rich. The exhaust stinks like fuel and the car stubles a bit. I just put a new motor in and when I fired it up I had to pull some fuel out using the PFC to get it to idle anywhere near decent since the A/F was around .98.

now I have it idling fairly well but it still seems a bit rich to me.

'93 RX-7
Mods are:
Street ported motor
Power FC
Bosch fuel pump
550 primary 1300 seconary injectors
N-Tech DP
Mid Pipe
N1 Dual cat back
No emissions stuff
Simplified turbo control system

Once the engine is broken in it's going to the dyno, but untill then i would like to get the idle situation worked out.

 

Sounds like you are not in closed loop yet. Is this with the car fully warmed up? Your O2 should cycle between .300-.900 V. If it's sticking around the .900+ range it is rich and is not in closed loop. Is it a new O2? If not did the old motor put coolant through the exhaust? If so this will destroy the O2, and you should buy a new O2. Or you have got ignition issues.

 

they dont run in closed loop at idle, because the air pump throws off the reading, from the o2 sensor. you should be ignoring the af meter at idle

mike