Rich Condition, Bank 1 & 2

[Big Bad James]

Not sure if this would be considered 'Advanced' or not....

My car has been getting a good 17 MPG in the city, and about 25 MPG on the highway. My car is not a hopped-up LT1, it's a lightly modded L36. It should be getting much better than this.

So I had a friend scan my PCM today for codes. Here's what he found (not sure of the code numbers):
MAF
RICH BANK 1
RICH BANK 2

MAF is more than likely due to the fact that I've ported/polished the TB/MAF, so a MAFT+ should correct that code. However, how do I correct this 'rich' condition so my engine isn't drinking fuel like I've got it at WOT? Oxygen sensors gone bad? Side effect of a ported/polished TB?

Any ideas?

[hockeyman]

I've ported'n polished my TB, and no codes as of yet. My car actually runs really nice. The MPG's are about 18 city and 27 highway. It's been like that ever since I've had it though.

[ka50]

bad maf sensor

which causes rich condition

replace maf sensor

[Big Bad James]

Originally posted by ka50:
replace maf sensor

So in other words, get out my wallet, bend over the table, and prepare to be violated by GM's money-grubbing minions.