Had subaru run a computer scan on my twin turbo subaru legacy 2002 as it was low on power. They came back and said primary turbo isn't working anda P0171 code is logged. I've looked the code up and says: Fuel trim malfunction (A/F too lean)
Anyone know how to fix this fuel thing! and aprox cost to fix a primary turbo!
Cheers
hijacka,
Dec 21, 1:30am
The primary turbos are prone to failure due to the constant quick spooling all the time so doesn't come as much of shock if it is nafd really, but fortunately those turbos are rebuilable on your model being roller bearing, price will depend on where you take it to and how the repair is carried out but its always best to rebuild rather than buy a worn out secondhand unit,(Perhaps remove it and send it off to a turbo specialist!) But it will be obvious when the turbo is removed if it needs/can be rebuilt or not. I see that code P0171 is relation to afm or 02 sensor, it could also be a leak anywhere between the afm to where the intake manifold bolt on to the head, i would start by Removing intake manifold and check the plastic under manifold intake pipe for splits or cracks especially around the breathers and where it joins on to the 2 turbo snouts etc,Replace intake manifold gaskets with new ones clean PVC valve and fit it back on properly. You will find that a vac leak will trick the 02 sensor fault code. If you can't do this yourself then jump on clubsub register and introduce yourself then ask for help on the wellington board, http://www.clubsub.org.nz/forum/index.php!action=registerI can think of a few welly members that might be keen to help. you just got to ask first ;) Don't drive it till its fixed.
prt21,
Dec 24, 9:03am
Cheers for that. Looks like the AFM sorted it. Can the AFM affect the turbo!
hijacka,
Dec 24, 6:49pm
No but a pod filter can effect the afm, try cleaning the afm first with electrical contact cleaner, The primary turbo will generally just stop spinning/spooling, but you should remove it first and inspect it as your just second guessing otherwise, its only a half hour job max.Turbo failure could be a lot of things like: lack of oil, running non synthetic oil for long periods, incorrect grade of oil, degraded oil due to lack of service and incorrect viscosity, oil starvation due to high speed Cornering and just high kms, I suggest you clear the ecu faults first then look at the turbo if the problems still there.you could always do a single turbo conversion
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