infamousmx664
New Member
- Joined
- Jan 9, 2012
- Messages
- 3
- Reaction score
- 0
- Points
- 0
- Vehicle Year
- 2001
- Make / Model
- Ford
- Transmission
- Manual
Hi I think I have tried everything and searched as much as possible to solve this check engine light problem. The truck has a slightly rough idle, throws code P0171 bank 1 too lean, spits black soot from the tail pipe, and sometimes i feel a power surge after 3500 rpms ehen im driving in say 2nd gear.
I have already replaced/removed the following;
new spark plugs
new air filter (oiled K&N)
switched MAP sensor with one I know works with no CEL
new valve cover gasket
inspected and cleaned intake manifold gasket
inspected and cleaned throttle body gasket
inspected and cleaned upstream O2 sensor
new plug wires
inspected coil pack
new thermostat
new oil pressure sensor
checked vacuum lines
new oil
new oil filter
new 50/50 coolant
can anyone HELP me with what might be the cause. i think the truck has been getting poor fuel economy because of this as well.... like 24mpg highway, where i should be seeing 27~
I have already replaced/removed the following;
new spark plugs
new air filter (oiled K&N)
switched MAP sensor with one I know works with no CEL
new valve cover gasket
inspected and cleaned intake manifold gasket
inspected and cleaned throttle body gasket
inspected and cleaned upstream O2 sensor
new plug wires
inspected coil pack
new thermostat
new oil pressure sensor
checked vacuum lines
new oil
new oil filter
new 50/50 coolant
can anyone HELP me with what might be the cause. i think the truck has been getting poor fuel economy because of this as well.... like 24mpg highway, where i should be seeing 27~
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