This is a b18b in a 97 civic. Well I got the cat (and 2nd o2 sensor) hooked up and now have no codes. The car is running rich. I have a A/F gauge and its all the way rich at idle. It will not move from the richest position. I don't know what the problem is. I have the stock civic fuel pump. I'm scared to drive it because of the rich condition. Also at idle there is black smoke coming out the exhaust at idle, or any rpm for that matter so I guess it is rich.


[Modified by 97hb, 4:04 AM 3/22/2002]


[Modified by 97hb, 4:05 AM 3/22/2002]

 

Well I was running the engine and noticed if I push the gas down fast the a/f gauge will start to lean out as the car is dying out. If I push the gas down slowly the revs keep climing and the a/f gauge shows it running fully rich (last green led), if its idleing it shows the same fully rich bar. Also pulled the iac plug off while the car was running and it died. Isn't that supposed to make it just idle lower?

 

Did the a/f guage work before? It could be defective.