- Joined
- Apr 13, 2009
- Messages
- 13,955
- Reaction score
- 5,096
- Points
- 113
- Location
- Calgary, Canada
- Vehicle Year
- '91, '80, '06
- Make / Model
- Ford, GMC,Dodge
- Engine Size
- 4.0,4.0,5.7
- Transmission
- Manual
- 2WD / 4WD
- 4WD
I bet the gas in the tank is basically varnish.But the previous owner said he never used the front tank because he couldn’t get it to fill.... like the Vent is screwed up.... at least 11 years old.....
Not sure why it would run good cold but not warm, perhaps engine management doesn't use the o2 sensor till warm? meaning it runs rich until then?