crazy idle air fuel ratios

[acdrew]

I fixed all my problems except the rev problem. I noticed since I put my wideband in that when I crank the car and it revs up that the afr is 10.00 -10.9. After the car has warmed up for about 5 it drops to 14.8-15.9. When I smash on it the car will hold a steady air fuel ratio of 10.9-11.7 and pull like crazy. Then after about 20 minutes of driving at idle ,it will start fluctuating from 9.0-10.5 and then jump to 17.0-19.0. I noticed that the car has been converted to open atmosphere with a hks bov, would this have anything to do with it. It has a gm 3" maf on it with a safc. I know the car has aftermarket injectors but dont know what kind. Is there a way you can convert the car to open atmosphere correctly, I have redone my vacuum lines and zip tied all of them,so I know that isnt the problem the car has run alot better since I redone them.

 

[Eclipse'd]

Definitely recirculate your BOV asap. When i got my gst the guy had a crushed 1g bov running atmospheric and the poor car would just bog down all the time, at stops, after revs, at the start. give it a whirl and let me know the results!

Boost gets you laid

 

[GSXSixteenG]

I fixed all my problems except the rev problem. I noticed since I put my wideband in that when I crank the car and it revs up that the afr is 10.00 -10.9. After the car has warmed up for about 5 it drops to 14.8-15.9. When I smash on it the car will hold a steady air fuel ratio of 10.9-11.7 and pull like crazy. Then after about 20 minutes of driving at idle ,it will start fluctuating from 9.0-10.5 and then jump to 17.0-19.0. I noticed that the car has been converted to open atmosphere with a hks bov, would this have anything to do with it. It has a gm 3" maf on it with a safc. I know the car has aftermarket injectors but dont know what kind. Is there a way you can convert the car to open atmosphere correctly, I have redone my vacuum lines and zip tied all of them,so I know that isnt the problem the car has run alot better since I redone them.

Yes, you can correctly have a atmosphere dump bov if you use a gm maf and maf translator. There are other ways, but this way seem most applicable to your current setup.

 

[acdrew]

The car has a gm blow through on it. Today driving the car would stutter real bad and not gain any speed at all. When the car would stutter it would show a 22.0 afr then go back to 15 cruising. Tryed to adjust my safc but its not really doin nothin to the afrs. I am gonna just save up and go with dsm link v3 the only thing is I dont know what size injectors I have or if the ecu is eprom converted. I also would like to run a set of 1600cc injectors. I also have a deskwerk 300lph fuel pump and for the time being im gonna run a stock replacment fuel filter. Tuning a friends car with his hondata we never could figure out why his afr's wouldn't change. His check engine light came on and the hondata showed a up stream faulty 02 sensor does the dsm link have these same capabilities to tell you if you have a bad sensor.