I have an 09 GT with long tubes. It’s throwing lean codes. I replaced the MAF. Didn’t work. I bought a bama tuner, through rich codes and several other codes. I turned it back to the stock tune. Should I get a professional shop tune? Thanks!
you need to log the rail pressure, fuel pump duty cycle, lambse1 and 2, kamrf1 and 2, iego1 and 2, then run it just under half throttle so it stays in closed loop on the interstate in 2nd gear up to 6k rpm or so to see if its in fact running lean
it could very well be just the long tubes screwing with the o2s or even a bad o2
A forum community dedicated to Ford Mustang owners and enthusiasts. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more!