pffe codes and misfire codes

Hey. I have an 05 Subaru legacy 2.5 gt.mods include fp black Turbo. Fmic. Borla headers with perrin up pipe and down pipe. 850 CC dw injectors. Grimspeed air fuel seperator and light weight crankshaft pulley. Recently installed a brembo brakes and Cobb SF intake tial q bov and Cobb ap. After I.changed the bov out the other day there appears to be a vacuum leak everytime I slow down the rpms drop down to like 200 sometimes just dies. And sometimes if I let it sit and idle it goes.crazy too. Any ideas on.what could be causing the misfire codes or p1491 code or p0030 codes?

I do have misfire codes for every single cylinder as well as the pffe and I.have looked at every forum and couldn't find a solution?

have you done a boost leak test ?

 

This may help.

http://www.subaruoutback.org/forums/66-problems-maintenance/48629-cel-due-p1491-pcv-valve-blow-hose-chewed-wire.html

 

This is a list of codes in the warranty forum on here.

 

the p0030 sounds like a bad front O2 they are about $100. call a lot of auto parts stores, the prices very widely.

Yes I have done a boost leak test and nothing to be seen yet. At least on the old bov I saw some forums and it seems alot of people said its a coil pack problem or fuel injector problem.

You can move the coil packs around and see if the code follows the coil pack. That' if you get a code for say, missfire in #2. Move it to #4 and see if the code follows it.

 

How many miles on the car ?

 

How long has it been on tune ?

Its a code for all 4 cylinders tho. And I haven't dyno tuned my car yet since the new Turbo yet I have 75000 miles on the car.

Actually every one but cylinder 3

It is also running very rich

Where do you live ? Get the car to a Tuner and have them street tune the car and see what they can tell from the data logs.

 

Or can you data log and send info to a Tuner ?

Actually every one but cylinder 3

 

If all except #3 I would start to look at the injector for #3 - it may be the real culprit. If that injector gives a lot more fuel than the others then the car will lean out the other cylinders causing them to misfire since the O2 sensor won't know that one cylinder is rich and the others are lean.

 

If you look at the spark plugs - are they identical or is one of them having a different look?

I reset the Ecu and it popped up.with p301this time so no cylinder 4 and 2. And the pffe code again. Also I was looking at the charged pipes right by the bov coming from the intake manifold and it was oily right after I drove. could a boost leak cause the car to idle eradicallyand die when I slow down? And cause the cylinder misfire code to pop up?

B/c I feel like when I swapped my bov out is when it started idling funny

Could that be because of a boost leak?

If the new BOV isn't sealing correctly it certainly can cause trouble. Or if you forget to connect a hose.

It is sealing properly an connected the hoses

But I feel oil below the coupler connecting to the intake manifold

But I feel oil where the piping connects to the intake manifold

But would a boost leak and a bad 02 sensor cause it to misfire so much and run rich?

You would hear a boost leak if it was at the connector where it clamps on the tmic to TB.

 

IMO a bad O2 will not cause a misfire.

 

If it was to rich, car should run like crap.

 

You may need to pull the spark plugs, how long have they been in there ? they should be replaced every 60,000 miles.

I replaced spark plugs less than 10000 miles ago

mods include fp black Turbo. Fmic. Borla headers with perrin up pipe and down pipe. 850 CC dw injectors. Grimspeed air fuel seperator and light weight crankshaft pulley. Recently installed a brembo brakes and Cobb SF intake tial q bov and Cobb ap.

 

I haven't dyno tuned my car yet since the new Turbo

 

Can you clarify what set-up your car is tuned for?

 

Did you get a tune when you installed your turbo, and now you added a BOV and an intake with no tune? Or have you never had the car tuned?

 

There is the distinct possibility all of these could be fixed with a trip to your tuner. Does the Tial BOV have recirc or is it full VTA? If you are not recirculating enough then your car will do crazy things. Your ECU also probably needs to have its MAF scaled for the COBB intake. I know COBB offers off the shelf maps for their intake but they do not have an off the shelf tune for your setup (different turbo, FMIC, headers, ect).

 

I also imagine that once you throw the codes that you are your ECU goes into limp mode, which would also explain why you are running rich... it just adds extra fuel because it has no idea whats going on and its trying not to grenade.

 

Once you make sure that there is in fact no vacuum leak and that your O2 is OK, you need to get it tuned ASAP.

Ok sweet I'm swapping the o2 then getting it tuned!

Its just a tune from online so not specifically for my setup but ill dyno tune it and change the o2 sensor

So I swapped out the o2 sensor and the inlet to the turbo and the o2 code went away but the p1491 stayed and so did the misfire codes do you think a bad tune could cause the blow by an misfires?