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I originally had a post about getting the code P0171, lean, bank 1. I have replaced both O2 sensors withing the last year, cleaned the Mass air flow sensor, and have changed the fuel filter.
I have a K&N air filter and a tornado in the car right now. Thinking back, I never had this problem when I bought the "Pre-oiled" brand new K&N. These problem arose just after last summer after I had re-oiled the K&N. My question is would a improperly oiled K&N cause this due to lack of flow or some oil build up of some kind, or is this a chance event that is not related? Keep in mind that I cleaned the mass air flow recently.
Other ideas I had:
Bad engine computer
Clogged Injector
Aside from the poorer gas milage and the engine light the car runs normal!
Sorry for the long post.
Thanks,
Jason
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Joined: Sep 2002
Posts: 320
CEG\'er
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CEG\'er
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Posts: 320 |
tornado=pos  . does this thing actually work  ? i don't think so or at least it didn't so for me. yes i also bought this pos!  i also have a drop in k&n but i have not had to reoil mine yet. i also have not had to clean my maf. sorry this isn't any help to you but i had to vent on the tornado. 
2006 fusion sel
1998 grand prix gtp(wife)
1993 dodge shadow es(winter beater)
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Joined: Sep 2003
Posts: 2,725
Hard-core CEG\'er
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Originally posted by JimRome25:
I originally had a post about getting the code P0171, lean, bank 1. I have replaced both O2 sensors withing the last year, cleaned the Mass air flow sensor, and have changed the fuel filter.
I have a K&N air filter and a tornado in the car right now. Thinking back, I never had this problem when I bought the "Pre-oiled" brand new K&N. These problem arose just after last summer after I had re-oiled the K&N. My question is would a improperly oiled K&N cause this due to lack of flow or some oil build up of some kind, or is this a chance event that is not related? Keep in mind that I cleaned the mass air flow recently.
Other ideas I had:
Bad engine computer
Clogged Injector
Aside from the poorer gas milage and the engine light the car runs normal!
Sorry for the long post.
Thanks,
Jason
Called Autozone for you since around here it is open 24 hours.... PO171 caused by
- faulty O2 sensor
- dirty MAF
- vacuum leaks
- intake leaks
First place I'd check ( since you did the first two) is the PCV hose very common place to have a crack.
I had PO171 and was getting terrible gas mileage, replaced downstream O2 and cleaned MAF and codes gone mileage back up.
Just checking you removed the MAF when you cleaned it right, that is how you do it the correct way.
Also are you sure you didnt damage it?
There is a TSB out for this code PO171 it says the MAF may be dirty.
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Took the MAF off the hose and off of it's perch. I don't believe I damaged it. Don't you have to take a load of crap off of the car to access the PCV, according to the chilton manual?
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CEG\'er
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hey i need to get that 24 hr autozone around here especially since i work nightshift and i am up all night on my days off 
2006 fusion sel
1998 grand prix gtp(wife)
1993 dodge shadow es(winter beater)
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Joined: Sep 2003
Posts: 2,725
Hard-core CEG\'er
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This for the Zetec by the way, so if you have a Duratech your out of luck cause there isnt directions os how to do it.
Disconnect the Battery (Since you may spill Coolant on the wiring)
Remove the Air Intake Assembly to allow for more room.
Remove the 3 bolts holding the Coolant Thermostat Housing to the Block. If you have not draining the cooling system, you may have some Coolant leak here. Make sure you do not do this when the engine is hot.
Remove the 2 bolts from the top of the Exhaust Manifold Heat Shield. Remove the 3rd bolt from the middle of the shield. Remove the Heat Shield by sliding it up.
You should now be able to see the PCV system behind the Manifold. You will see a thin metal pipe going from the front of the engine to the right and around the engine under the Thermostat housing. Right at the edge where the pipe is running, there is a bolt holding this pipe to the block securely. Using a torx socket, remove this bolt. You may have to hold the thermostat housing up to access it. If it is easy for you, the best thing would be to remove the housing by disconnecting the hoses.
Once the bolt is removed from the bottom of the car, you are able to stick your hand up behind the Exhaust Manifold and grab the pipe. Pull the pipe out. You will see the PCV Valve come out on the tip of the pipe. Remove the PCV Valve and insert the new one.
You can now come out to the top of the car and insert the PCV Value back in and reinstall the other parts. Be careful when inserting the middle nut in the Exhaust Manifold Heat Shield. I put mine back in and it went in diagnal and stripped my threads.
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