p0171 and p0174 issues - Pontiac GTO Forum
User Tag List

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 11 (permalink) Old 10-05-2015, 02:14 PM Thread Starter
 
Join Date: Nov 2011
Location: Clarkesville, Ga
Posts: 78
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Garage
Send a message via MSN to Gto-noob Send a message via Skype™ to Gto-noob
p0171 and p0174 issues

car has 201,xxx miles 2006 m6 pacesetter lt, catlesss mids, SLP predator tune.vararam intake. bout a week ago car got p0171 and p0174 codes, car didnt act different in anyway still drove good, no loss of power. went camping for 3 days. got to my friends has and started driving home. car started running super rich i ended up getting 10.5mpgs got home, replaced MAF, cleaned tb, checked for vaccum leaks, intake leaks, cleaned spark plugs and regapped. threw in stock tune. problem still persists. oxygen sensors are about 10k miles old. during a warm start. car will idle perfect for ~30seconds and slowly start running more and more rich until it idles at 2.9gal/hour. if i rev and hold at any rpm ex- 1500rpm will stutter and drop to about 1200rpms. any thoughts or solutions would be great.
Gto-noob is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 10-05-2015, 08:15 PM
Former Moderator
 
svede1212's Avatar
 
Join Date: Oct 2005
Location: Grand Rapids, Michigan
Posts: 4,081
Mentioned: 0 Post(s)
Tagged: 1 Thread(s)
Quoted: 25 Post(s)
Garage
I know it's obvious but either you're running lean from a leak or both front O2s are reading it wrong. Those are lean codes and you're running rich. The car should go in closed loop with the O2s keeping the fueling within range.

2004 Blk/Rd M6
6.3 litre LS1

Built and tuned by svede
svede1212 is offline  
post #3 of 11 (permalink) Old 10-05-2015, 08:44 PM Thread Starter
 
Join Date: Nov 2011
Location: Clarkesville, Ga
Posts: 78
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Garage
Send a message via MSN to Gto-noob Send a message via Skype™ to Gto-noob
i replaced the 02 sensors probably 10k miles ago. and today i checked for vacuum leaks no sign of any leaks. you think it could be clogged fuel filter?
Gto-noob is offline  
 
post #4 of 11 (permalink) Old 10-05-2015, 09:18 PM
Former Moderator
 
svede1212's Avatar
 
Join Date: Oct 2005
Location: Grand Rapids, Michigan
Posts: 4,081
Mentioned: 0 Post(s)
Tagged: 1 Thread(s)
Quoted: 25 Post(s)
Garage
Quote:
Originally Posted by Gto-noob View Post
i replaced the 02 sensors probably 10k miles ago. and today i checked for vacuum leaks no sign of any leaks. you think it could be clogged fuel filter?
Unlikely. The "filter" for what it is is in the tank. Sounds like your running rich which would be the computer is telling it to dump in fuel and it's able to keep up.

2004 Blk/Rd M6
6.3 litre LS1

Built and tuned by svede
svede1212 is offline  
post #5 of 11 (permalink) Old 10-05-2015, 09:35 PM Thread Starter
 
Join Date: Nov 2011
Location: Clarkesville, Ga
Posts: 78
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Garage
Send a message via MSN to Gto-noob Send a message via Skype™ to Gto-noob
okay so not fuel pump/filter. wanna point me in a direction cause ive been checking for leaks all day
Gto-noob is offline  
post #6 of 11 (permalink) Old 10-05-2015, 10:01 PM
Former Moderator
 
svede1212's Avatar
 
Join Date: Oct 2005
Location: Grand Rapids, Michigan
Posts: 4,081
Mentioned: 0 Post(s)
Tagged: 1 Thread(s)
Quoted: 25 Post(s)
Garage
Were you O2s OEM and wired up with the plugs they came with?

2004 Blk/Rd M6
6.3 litre LS1

Built and tuned by svede
svede1212 is offline  
post #7 of 11 (permalink) Old 10-06-2015, 09:00 AM Thread Starter
 
Join Date: Nov 2011
Location: Clarkesville, Ga
Posts: 78
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Garage
Send a message via MSN to Gto-noob Send a message via Skype™ to Gto-noob
Yup. I have the driver side o2 using an extension due to the long tubes
Gto-noob is offline  
post #8 of 11 (permalink) Old 10-06-2015, 12:31 PM
Former Super Moderator
 
Rukee's Avatar
 
Join Date: Feb 2007
Location: South Central Wisconsin
Posts: 9,919
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
Where did you buy the O2 sensors from??
Rukee is offline  
post #9 of 11 (permalink) Old 10-06-2015, 08:37 PM Thread Starter
 
Join Date: Nov 2011
Location: Clarkesville, Ga
Posts: 78
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Garage
Send a message via MSN to Gto-noob Send a message via Skype™ to Gto-noob
rockauto
Gto-noob is offline  
post #10 of 11 (permalink) Old 10-06-2015, 08:38 PM Thread Starter
 
Join Date: Nov 2011
Location: Clarkesville, Ga
Posts: 78
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Garage
Send a message via MSN to Gto-noob Send a message via Skype™ to Gto-noob
o2s are running at .60-.69v and the others are .01-.02
also looked at fuel pressure is around 55-58 and at idle needle moves rapidly between 50-60
Gto-noob is offline  
Sponsored Links
Advertisement
 
Reply

  Pontiac GTO Forum > The 2004-2006 GTO > Service, Maintenance and Technical Discussion

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pontiac GTO Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
P0300, P0174 check engine codes, rough idle, smell BlueBeast85 Service, Maintenance and Technical Discussion 2 05-11-2018 06:01 PM
04 gto trouble codes P0171, P0174 and P0300 after LT headers install chris190 Engine Tuning 7 08-14-2015 09:18 AM
M6 issues LSGOATFAN Drive train, suspension, alignment and brakes. 3 09-24-2012 10:13 AM
Has anyone else done this could this cause issues?? WV_GTO Intake and Exhaust Discussions 4 01-14-2011 06:46 PM
Will I have issues? fusser87 Wheels and tires 7 04-10-2009 11:22 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome