maf calibration question.

I had the same problem as you, only mine was running so lean it was off the chart, this is normal as your computer is not made to work with 24# injectors but the good news is I found a cheap & easy way to fix it, Pro-M Remote Optimizer, I got mine today "Picked it up on ebay for $100,00 new" I dropped it inline with the Mass meter wiring & turned the two screws back & forth a few times and

well what C&L does is change the sample tube. That is the tube in the middle of the Meter. They do this by fooling the ECU computer. So you can use you stock little mass air computer. Pro-M gives you another Little computer or electronic peace. What ever you want to call. So Pro-M does not fool it they accutally calibrate it.

Well I've tried everything, you name it I replaced it, even Ford told me I would either need to bump my injectors another size or pay big bucks for my computer to either be reprogrammed or a EEC Tuner, I was informed by the Mustang shop that dynoed my ride that I would need a Pro-M Optimizer & sure enough it did it, you can read more about the Remote Optimizer here http://www.pro-flow.com/Product pages/remote_optimizer.htm

This thing even allows you to recalibrate when upgrading injectors without having to send meter back or having to purchase larger sample tubes, up to like 4 injector sizes, also what it most importantly does is it allows you to fine tune air/fuel ratios @ both high & low rpm