Camaroguy
New Member
- Joined
- Aug 3, 2018
- Messages
- 7
- Reaction score
- 0
- Points
- 1
- Location
- Fort Myers, Florida
- Vehicle Year
- 1999
- Make / Model
- Ford
- Transmission
- Manual
Ok guys so my truck is getting about 20mpg on the highway and I don’t even want to know mpg for in town. So I’ve been watching the data on my scanner will driving and the mass air flow is reading 3-3.5 gps at 700-800 rpm and 50-58 gps at 3000 rpm witch is highway speed is that normal or is the mass air flow out of calibration? Also the sort fuel trim bounces around rich and lean the way it should but at cruising speed on the highway it will jump to 29.1 short fuel trim. I’m at a loss of where to go
A little history bought this truck had rod knock rebuild the engine has 175 across the board replaced both o2s sense one was dead the other slow replaced spark plugs with oe then smoke tested and found idle air and Egr leaking replaced them still no improvement in fuel economy
Thanks
A little history bought this truck had rod knock rebuild the engine has 175 across the board replaced both o2s sense one was dead the other slow replaced spark plugs with oe then smoke tested and found idle air and Egr leaking replaced them still no improvement in fuel economy
Thanks