So i need some help!!? boost leak found...

[coowhip]

Ok, I went to look for a boost leak today and pressurized the system like the DIY said to and followed the instructions. Found the boost leak, it was a 90 degree hose bend in the upper right hand corner of the motor and intake manifold, a 1 inch line. For temporary purposes I went and got some electrical tape just to see if it would boost and higher than the 10lbs i've been getting.

Well it boosted up to 12-13 lbs which means the car is chipped and I have that program loaded with APR but it obviously still has a leak. So as i'm driving, in between gears and sounds like i have a blow off valve where the diverter is. So i'm assuming the DV is bad? Now that it started making this new noise, on the way home my CEL light comes on and it only boosts up to 5lbs...wtf?

I went to Autozone to use their OBD II scanner and found this:

P0171 System too lean

DTC cause freeze frame
2520 rpm
load value 10.1%
coolent temp 213 F
short term fuel trim 1 - 10.9%
long term fuel trim 1 - 22.6%
short term fuel trim 3 - 100.6%
long term fuel trim 3 - 100.6%
speed 52 mph
fuel sys 1 clsd
fuel sys 2 n/a

So would a bad DV cause this code or a bad MAF sensor? or anything else...

[dirtybrd]

Anytime I've ever seen a P0171, it's been a bad MAF, but with the leak you have I'd fix that before condeming the MAF.

[Audi Skate Snow]

p0171 could also be vacuum leak... most of the time ive seen it just be that... like dirty said, check the leaks first... then log and see what your maf is saying

[RED1.8T]

hey coowhip, I saw you on Polaris parkway last weekend...
Car looks great man

[old guy]

Read post #5: Clicky click And this thread: Clickly click

[coowhip]

Thanks for the props. Got the forge 007 in today so i'm going to go get some more vacuum line tomorrow morning. What are the sizes around the DV that I need?

[A4 KiDD 810]

Hey if you need the OEM replacement for the vacuum hose, I accidentally ordered 2 when I had the same problem a while back. I have the extra just lying around never been installed if you want it PM me just pay shipping. I got a hole in mine right after I got chipped with 1+ due to the extra boost, and I was back down to stock power or less just with that 1 rip. Funny how that little thing causes so much trouble. Well just PM me and i'll tell you how to prevent it again with the oem hose and all that good stuff, no need to buy a hose that might not work properly for the job. Dont worry about those other things you listed, replace the hose first and most likely some or all of them will be fixed. If not, then worry about the other things.

[coowhip]

So there wasn't an OEM DV to my surprise. It was one of these...

Racing Bypass Valve Type 25 (RBV-25) TurboXS
http://www.turboxs.com/shop_prod.php?what_category=2

So that would explain the whoosh sound between shifts. Question is, would that cause my CEL light to come on and give and engine too lean code???!!!

Just installed the Forge 007 DV and haven't given it a test run yet. Waiting for responses...

[dirtybrd]

Doubtful.

[Audi Skate Snow]

Did you check all the vacuum lines?

[coowhip]

Yea i've checked all of them...when I had the system pressurized the only leaking "sound" i could tell was coming from the BOV/DV area. Now that I have the forge 007 there I'm hoping the problem is solved. Almos also trying to clean the MAF and IAT sensor just in case.

[coowhip]

So now I have a rough Idle just under 800 rpms...seems to be running rich or something cause it smells a little like gas. the "!" with a trangle and around around it light came on...now what do I do? Could it be the O2 before the cat? the one after the cat was replaced 6k miles ago..

[coowhip]

ok so the car runs much better after driving it for a few minutes and APR is in full swing with more boost! yay! now i have a CEL for the MAF sensor, so i'm going to try and clean it and see what happens.

[coowhip]

So my car decided to stutter on the way to work this morning and at the light it finally just died. I would hold an idle. So I let it sit for a min, finally got it started and into a parking lot. I have a check engine light for the MAF, so I'm assuming thats what it is. I used the MAF cleaner and apparently it didn't seem to help. This was after 15 minutes of 60mph driving. I waited a few minutes, started it back up and went to work just fine. Does this sound like a bad MAF for sure?

[coowhip]

anyone?