Zerocide
New Member
- Joined
- Oct 6, 2007
- Messages
- 30
- Reaction score
- 0
- Points
- 0
- Age
- 36
- Location
- Black Forest, Co
- Vehicle Year
- 1999
- Make / Model
- Ford
- Transmission
- Automatic
I got a 1999 3.0 flex fuel that had its mpg have a sudden drop. I went from 18-19 mpg with normal gas to 14-15. and from 14-15 with E-85 to 12-13. I play around it both fuels frequintly thats how i know what i get for both. All i have done is recently i straight piped it but went through 2 tanks before i noticed the sudden drop. I allways thought losing the muffler would increase its power and economy but is it possible that the 99 3.0 needs the back pressure from the muffler? Even then i wonder why i went through 2 tanks fine.