Hi all,so i've had my 06 EJ257 STI for a year now and Saturday I get a P0171 system lean error.
So I'm going to clean the MAF but I also need to do the fuel filter. My intake is a new perrin setup afta maf + turbo inlet so I doubt a problem there.
Tricky part:
Previous owner replaced the oem fuel pump with a walbro pump (he thinks) with out a in tank filter. A engine bay filter (autozone part not oem to the previous gen) was installed by removing the fuel damper on the feed line.
So thats the setup.
I need to change the filter.
Do I:
1. Keep the setup and change the filter with a oem enginebay filter as with blob?
2. Change it all back to stock.
3. Return to stock keeping the walbro pump?
I do not yet know the pump tails as i still need to open up up and see it for myself.
Ive heard the stock bov/recirculating valve can give issues relating to this code, any truth to that?
So I'm going to clean the MAF but I also need to do the fuel filter. My intake is a new perrin setup afta maf + turbo inlet so I doubt a problem there.
Tricky part:
Previous owner replaced the oem fuel pump with a walbro pump (he thinks) with out a in tank filter. A engine bay filter (autozone part not oem to the previous gen) was installed by removing the fuel damper on the feed line.
So thats the setup.
I need to change the filter.
Do I:
1. Keep the setup and change the filter with a oem enginebay filter as with blob?
2. Change it all back to stock.
3. Return to stock keeping the walbro pump?
I do not yet know the pump tails as i still need to open up up and see it for myself.
Ive heard the stock bov/recirculating valve can give issues relating to this code, any truth to that?