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    Thread: P0171 back again!@#!@#

    1. Member Vinnyty's Avatar
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      01-23-2011 03:37 PM #1
      So i brought the car to the dealership and so far they have blamed the p0171 on the pcv valve then my forge air intake and then another dealership fixed the purge valve but now its back.

    2. Member Vinnyty's Avatar
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      01-23-2011 05:03 PM #2
      Help meeeeeeeeeeee! This is the list im going to have the dealer check.

      02 sensors,
      diverter valve,
      intake flapper
      mass air sensor
      cam follower.

      Maybe its one of those.

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      2006 Passat 2.0t 6mt
      01-23-2011 06:42 PM #3
      P0171 - System Fuel Lean

      Typically that can be related back to a vacuum leak somewhere. Thats a good starting point.

    4. Member Vinnyty's Avatar
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      01-23-2011 06:58 PM #4
      it has been in 3 or 4 times and they thought they fixed it. Blamed it on the turbo inlet hose on my forge kit which is really tight so that cant be it.

    5. 01-23-2011 07:10 PM #5
      why not reinstall oem intake and then let them deal with it. once it is fixed go back to your forge intake.
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    6. Member Jettn1's Avatar
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      01-24-2011 10:39 AM #6
      Quote Originally Posted by Vinnyty View Post
      Help meeeeeeeeeeee! This is the list im going to have the dealer check.

      02 sensors,
      diverter valve,
      intake flapper
      mass air sensor
      cam follower.

      Maybe its one of those.
      When my cam follower was shot....mine threw the P0171, ad also the CEL would come and go and eventually it stayed on. Of course I had the typical issues that goes along with it....hence limp mode and some jerking when trying to pass people. Depending on if it is the cam follower and how bad of shape it is....you sometimes have to get a new HPFP and cam shaft also. GL to ya!!
      1999 Jetta GL - 1998 to 2003 my first VW
      2002 Nissan Altima - 2003 to 2006 JUNK!! went back to VW
      2006 Jetta 2.5 - 2006 to 2010
      2007 Passat 2.0t Sport Pkg. II 6MT - 2010 to 2012
      2010 CC Sport DSG - current

    7. Member Jettn1's Avatar
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      01-24-2011 10:46 AM #7
      Quote Originally Posted by Vinnyty View Post
      Help meeeeeeeeeeee! This is the list im going to have the dealer check.

      02 sensors,
      diverter valve,
      intake flapper
      mass air sensor
      cam follower.

      Maybe its one of those.

      Sorry for earlier post that was when I was getting the P2293....When mine threw the P0171...it was the intake flapper. Had it replaced and never had a problem again. I didn't even have any issues other than the CEL coming and going. GL to ya!!
      1999 Jetta GL - 1998 to 2003 my first VW
      2002 Nissan Altima - 2003 to 2006 JUNK!! went back to VW
      2006 Jetta 2.5 - 2006 to 2010
      2007 Passat 2.0t Sport Pkg. II 6MT - 2010 to 2012
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    8. Member Vinnyty's Avatar
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      01-24-2011 04:11 PM #8
      Im getting some misfire codes now.

      p0300
      p0302
      p0300 pending
      p0302 pending
      p0301 pending

      Freeze frame data pulled from loaner scan tool at advance auto :

      DTC Caused freeze frame p0171 > Throttle Position > 18.00%

      RPM > 1837
      Barometric pressure > 99 KPA

      Load value > 23.5%

      Air Flow rait > 11.91 gr/sec

      Ambient air temp > 26 deg F

      Coolant temp > 143 deg F

      Air intake temp > 26 deg F

      Ignition timing adv > 14.0 deg

      Short term fuel trim > 1.5%

      Long term secondary 02s fuel trim bank 1 > 0.8%

      Short term Fuel trim 3 > -100.6%

      Long term fuel trim 3 > -100.6%

      Long term secondary 02s trim bank 3 > 100.6%

      Vehicle speed > 26mph
      Absolute load > value 35.0%
      Fuel pressure > 7040kpa
      Fuel system 1 > clsd
      Relative throttle position > 7.4%
      Command throttle actuator > 9.8%
      Absolute throttle position > 17.6
      Pedal position d > 32.1%
      Pedal Position e > 32.5%
      Evap purge > 0%

      Volts > 14.630
      Time since engine start > 3:58 m:s

    9. Member Vinnyty's Avatar
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      01-24-2011 07:28 PM #9
      all that info doesnt tell me much other than hints upon the flapper on the intake. any input?

    10. Member Vinnyty's Avatar
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      01-26-2011 11:06 PM #10
      So the car is back home after 2 days at the dealer. Laundry list of items fixed.

      Smoke tested and found small leak at oil breather fixed oring and replaced hose.
      Replaced valve cover gasket
      Fixed transmission valve body
      Pcv and purge valve replaced last week.
      smoke tested again no leaks.


      This was in the shop for the p0171 code

      Guess what IT Flying kite came back again!!! Was off for about 6-8 hours. They say they want the factory airbox on before further troubleshooting.

    11. Member passatfan2006's Avatar
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      01-27-2011 08:01 AM #11
      Quote Originally Posted by Vinnyty View Post
      Guess what IT Flying kite came back again!!! Was off for about 6-8 hours. They say they want the factory airbox on before further troubleshooting.
      Which makes sense. You are lucky that the dealer is not giving you grief with the non-oem intake. It is fairly easy for them to blame it on the current intake and wash their hands off.
      Your best bet is to restore the original intake and get it checked out before they change their mind

    12. Member Vinnyty's Avatar
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      01-27-2011 09:15 AM #12
      I dont understand why the forge intake is causing issues. Mike at forge said its not possible. I broke my factory airbox due to cold weather so im trying to track one down.

    13. Member Vinnyty's Avatar
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      01-27-2011 03:47 PM #13
      ITs really weird. the car runs great if im out for a long drive then it runs like crap. When its running good I can hear the turbo spool up then i can hear the blow off valve. When its running crappy I cant really hear the turbo suck in and i can barely hear the diverter valve.

    14. Member Vinnyty's Avatar
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      02-07-2011 07:25 PM #14
      so i have been working with rosstech on the vagcom tech forum here on the vortex. they had me read the idle and running trim levels. Looking like the running trim is out of whack. they also had me do a test on the maf running in 2nd gear at redline to see what the gallons per second were coming in the intake. Im only reading 60-80 g/s should be like 160-180 or 60% of horse power. going to dealership friday to have them replace Mass air flow.

    15. Member low_passat's Avatar
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      02-07-2011 09:47 PM #15
      Quote Originally Posted by Vinnyty View Post
      so i have been working with rosstech on the vagcom tech forum here on the vortex. they had me read the idle and running trim levels. Looking like the running trim is out of whack. they also had me do a test on the maf running in 2nd gear at redline to see what the gallons per second were coming in the intake. Im only reading 60-80 g/s should be like 160-180 or 60% of horse power. going to dealership friday to have them replace Mass air flow.
      Are you going to have the orginal air box/intake on? If not I suspect they will give you grief about your intake and say you screwed it up when you did the intake install.
      2007 Candy White/Black Passat 2.0T Wolfsburg Edition| APR Stage 2+ | APR HPFP | Forge WINtake | S3 Intercooler | B&B 3" Turbo-Back Exhaust | Dogbone Insert | FK Silverline+ Coilovers | Front Lip Spoiler/Hi-Def Sideskirts | Votex Trunk Lip Spoiler | R-Line Fog Grilles | Clear Corners | HID Kit - low beams & fogs | RCD-510 | Podi Boost gauge | R-Line Pedals | GTI Steering Wheel |

    16. Member DJBeanPole's Avatar
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      02-07-2011 10:02 PM #16
      I seriously hope its not your Forge vinny!

    17. Member slowhatch's Avatar
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      02-08-2011 03:42 PM #17
      I also had a lean fault which the dealership then blamed on my newly installed forge intake. They pretty much refused to do anything about it so i took the car back and did my own trouble shooting.

      Ended up pulling the intake off and really thinking about why i would i be running lean part throttle. The only real simple reason is un metered air past the MAF. I also noticed that there was some oil residue in the inlet elbow of the turbo and realized off bat that the PCV had failed.

      Took the car back to the dealer, told them i want them to replace the PCV and that if the tech hadnt been so pre occupied with aftermarket parts and actually did some thinking/troublshooting on WHY the problem was occuring it would have been obvious. (However, i completely understand the dealerships point on not being keen on aftermarket parts--why waste their money/time troubleshooting other peoples mistakes/bad machining/etc.)

      All in all after they replaced the valve (under warranty i may add) the CEL cleared and all has been right ever since.
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    18. Member Vinnyty's Avatar
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      02-08-2011 04:45 PM #18
      they already replaced the pcv valve but never replaced the orange gasket. I still noticed alot of oil coming from the metal pcv line on the back of the motor to the turbo. this was after the pcv. so i cleaned it up and oil still went through.
      07 B6 Passat 2.0 turbo - http://unitronic.ca Unitronic Stage 2 HPFP - High flow cat downpipe 3" - ABD Racingwerks intake Stage 2 - HPFPUpgrade.com Stage 1 HPFP - 142 Bar fuel Pressure relief valve - 5 zigen Oil catch tank - Autotech 3" catback - Adams Rotors - H&R Springs teamed with Bilstein Sports.
      http://i51.tinypic.com/153w51g.png

    19. Member Vinnyty's Avatar
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      02-08-2011 04:47 PM #19
      Also I returned the car back to stock and getting waaaaaaay better readings now............ I cant imagine an intake causing lean condition. reading about 160-180 g/s on the maf in 2nd at redline. Also idle lambda is 0.8% and lambda mult is 1.6%
      07 B6 Passat 2.0 turbo - http://unitronic.ca Unitronic Stage 2 HPFP - High flow cat downpipe 3" - ABD Racingwerks intake Stage 2 - HPFPUpgrade.com Stage 1 HPFP - 142 Bar fuel Pressure relief valve - 5 zigen Oil catch tank - Autotech 3" catback - Adams Rotors - H&R Springs teamed with Bilstein Sports.
      http://i51.tinypic.com/153w51g.png

    20. Member Vinnyty's Avatar
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      02-08-2011 04:59 PM #20
      here is the link to the vagcom thread ive been posting scans in.

      http://forums.vwvortex.com/showthrea...ean-code-p0171
      07 B6 Passat 2.0 turbo - http://unitronic.ca Unitronic Stage 2 HPFP - High flow cat downpipe 3" - ABD Racingwerks intake Stage 2 - HPFPUpgrade.com Stage 1 HPFP - 142 Bar fuel Pressure relief valve - 5 zigen Oil catch tank - Autotech 3" catback - Adams Rotors - H&R Springs teamed with Bilstein Sports.
      http://i51.tinypic.com/153w51g.png

    21. Member Vinnyty's Avatar
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      02-08-2011 10:52 PM #21
      can anyone explain to me how the forge intake would cause the maf to read so little air flow? I have never had an issue with a intake on any car ive had
      07 B6 Passat 2.0 turbo - http://unitronic.ca Unitronic Stage 2 HPFP - High flow cat downpipe 3" - ABD Racingwerks intake Stage 2 - HPFPUpgrade.com Stage 1 HPFP - 142 Bar fuel Pressure relief valve - 5 zigen Oil catch tank - Autotech 3" catback - Adams Rotors - H&R Springs teamed with Bilstein Sports.
      http://i51.tinypic.com/153w51g.png

    22. Member slowhatch's Avatar
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      02-09-2011 02:10 AM #22
      i really cant see how the intake would be causing a lean condition.

      Lets examine the facts... if your running lean and we assume your fuel system is delivering as promised (hpfp, injectors, cam follower ok, etc) then somewhere between the MAF and the combustion chamber your letting in un-metered air.

      On my car the fact that the pcv had failed (as a check valve its only supposed to open 1 direction so that it cant allow boost to creep back into the crankcase and pressurize the system) and was causing crankcase gases to vent back into the intake tract, which because its located after the MAF was un-metered air and leaning the mixture out. For some reason i suspect that even though you have replaced your pcv that maybe you didnt seat the gasket right, or the gasket is leaking.

      BUT, since you say you put the stock intake in and everything went back to normal, i dont know what to say. It just doesnt make sense. There is no way that Forge unit is causing your AFR to dip unless your MAF is bad. Also examine that last silicone elbow (the one between the maf and the turbo inlet elbow, make sure there are no holes/tears in it.
      Gen 4 Very Viper Orange Viper - 700hp+ Full bolt on NA
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    23. Member passatfan2006's Avatar
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      02-09-2011 12:39 PM #23
      Quote Originally Posted by Vinnyty View Post
      Also I returned the car back to stock and getting waaaaaaay better readings now............ I cant imagine an intake causing lean condition. reading about 160-180 g/s on the maf in 2nd at redline. Also idle lambda is 0.8% and lambda mult is 1.6%
      So either there is an issue with the Forge intake or it was not connected right. Is it possble that there is a hairline crack somwhere letting air in!!!

    24. Member slowhatch's Avatar
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      02-09-2011 02:28 PM #24
      So... after getting my issue "resolved" with a new PCV, i am merging on to the freeway today felt a slight hesitation and ANOTHER CEL.. GOD DAMNIT

      I am so sick of taking this thing in to the dealer and being driven around by friends/family. Ive had into the dealer 3 times in the last week, the last time they fixed the PCV they broke both of the intake mounting locations by using an impact to run up the two little baby screws by the front bumper (where the 'ram air' scoop is). So i had to take the car to BARtuning to have them drill out the holes and install spiralocks so that the intake could be secured. Let me tell ya that was real cheap

      Now i gotta go back again.. if its another lean code i dont know wtf else to do except put the factory intake back on. The noise aint worth all this bull****
      Gen 4 Very Viper Orange Viper - 700hp+ Full bolt on NA
      987.2 Aqua Blue Boxster S - PDK
      @sneakysnakes

    25. Member Vinnyty's Avatar
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      02-09-2011 04:23 PM #25
      Hey you really should notify mike at forge that this is happening. Because he thinks im crazy. Im guessing your car isnt chipped? because mine isnt either.

      I found out that with the 2.5l engine on the jetta and rabbit if you put a cold air in a non chipped car you have to get some sort of insert for the maf. But when they chipped it ran fine.
      07 B6 Passat 2.0 turbo - http://unitronic.ca Unitronic Stage 2 HPFP - High flow cat downpipe 3" - ABD Racingwerks intake Stage 2 - HPFPUpgrade.com Stage 1 HPFP - 142 Bar fuel Pressure relief valve - 5 zigen Oil catch tank - Autotech 3" catback - Adams Rotors - H&R Springs teamed with Bilstein Sports.
      http://i51.tinypic.com/153w51g.png

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