Originally Posted by 07FocusST
Just an FYI... It seems that everyone (including myself) who has run a 3" Blow-Thru MAF housing has been through hell trying to tune it correctly. There has been a couple of DIY'ers that have run the OEM MAF meter with a 2.5" Blow-Thru housing & the Diablosport MAFia. I plan on coverting to this setup when I return from deployment. My idle has gone to crap between the 3" MAF Housing and the Mustang MAF Meter being used.
Your issue isnt with the 3 inch MAF tube but with the tuner LOL, The 3 inch and the 2.5 are the same to tune its just knowing how to do it , yes blowthrough it a little trickier to do mainly because people make it harder then it has to be in the tuning part
Even with the 3 inch MAF you will need the diablo MAFia , loose the not needed Mustang MAF and use the Focus MAF , Never understood using the Mustang MAF