2g maf on 1g car running real lean

[rarest_90_DsM]

so i swapped my 1g maf for a 2g i wired it according to vfaq the car idles fine but makes no power my cheap ass air fuel gauge says its running way lean like not even registering on the gauge but when i let off the gas it spikes rich! everything is heat shrinked and soldered the install was done right. so my question is what would make the car run lean? I know the computer has to relearn the sensor but i cant really drive it like this! Its a 1990 eclipse converted to turbo never had any problems before now. it feels real sluggish and falls on its face alot any suggestions are appreciated

 

[JayRolla]

All I know is with a 4g63t you have to have some fuel control or it will run lean as hell. Also dropping in some 550's in a 4g63t almost makes it work perfect. but some cars it doesnt. you should have fuel control in a N/T turbo so it probably needs tuned better.

 

[92awddsm]

The 2g mas flows roughly 20% more air than the stock 1g mas. Because of this, you need an afc, chipped eprom, dsm, or something similar so you can richen the stock a/f settings to compensate for the increased airflow. Our stock ecu is not calibrated for a 2g mas so the ecu will never "learn".

 

[kelvinb]

did you read the part in the write up where it said "If you install 550s at the same time as the 2G MAF, very little tuning should be necessary on the AFC to have the car running as strong as ever, without the MAF overrun problems."

 

[Auto RS T]

The 2g mas flows roughly 20% more air than the stock 1g mas. Because of this, you need an afc, chipped eprom, dsm, or something similar so you can richen the stock a/f settings to compensate for the increased airflow. Our stock ecu is not calibrated for a 2g mas so the ecu will never "learn".

This is accurate info. The 2g mas is not a drop in and go. The vehicle will require more mods.

 

[funniegus]

You running a t25, should of used a 14b.