Thread: Failed Emissions 1991-3.1L

Results 1 to 3 of 3

Hybrid View

Previous Post Previous Post   Next Post Next Post
  1. #1 Failed Emissions 1991-3.1L 
    wileym1
    wileym1 is offline
    SE Level Member
    Join Date
    Jan 2015
    Location
    Indiana
    Posts
    2
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Default 01-07-2015
    Hey everyone, Mark here and new to this Grand Prix site. Long story short, I have a 91 Grand Prix LE 3.1L that won't pass emissions. Changed plugs, wires, pcv valve and oil to start with and had it tested for the 2nd time, still won't pass(barely passing). If I post the test results could someone point me in the right direction??? Bought 6 new fuel injectors but haven't changed them yet. Need more info?? Having trouble uploading graphing results! HELP!!

    reading standard
    HC 1.78 0.80
    CO 10.80 15.00
    NOx 1.94 2.50
    CO2 397.20 n/a
    Last edited by wileym1; 01-07-2015 at 01:32 PM.
    Reply With Quote  
     
  2. #2 Re: Failed Emissions 1991-3.1L 
    BillBoost37
    BillBoost37 is offline
    Turbo is the way to go. BillBoost37's Avatar
    Join Date
    Jul 2009
    Location
    W Spfld
    Posts
    26,815
    Thanks (Received)
    53
    Likes (Received)
    90
    Dislikes (Received)
    1
    Default 01-07-2015
    Not knowing ... I googled it for you
    http://www.smogtips.com/failed-high-hydrocarbons-HC.cfm

    I'd look right on top of the TB for that typical stupid vacuum line leak.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
    Reply With Quote  
     
  3. #3 Re: Failed Emissions 1991-3.1L 
    wileym1
    wileym1 is offline
    SE Level Member
    Join Date
    Jan 2015
    Location
    Indiana
    Posts
    2
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Default 02-02-2015
    Quote Originally Posted by BillBoost37 View Post
    Not knowing ... I googled it for you
    http://www.smogtips.com/failed-high-hydrocarbons-HC.cfm

    I'd look right on top of the TB for that typical stupid vacuum line leak.
    Update, checked rubber grommet on top of TB, used some prv sealant without getting in vacuum lines and sealed. Changed all 6 injectors and the O2 sensor, had it tested again (3). Failed miserably. HC and CO I believe went through the roof but NOX was under limit. Time and money are hard to come by right now. Any other suggestions??? Thanks for you input.

    Mark
    Reply With Quote  
     
« Previous Thread | Next Thread »

Similar Threads

  1. 1991 Lifted Z71
    By GrandPrixgtp2000 in forum Members Rides
    Replies: 77
    Last Post: 08-22-2013, 08:58 PM
  2. Failed Emissions Test
    By Biohazed in forum 3.8L V6 Naturally Aspirated (L36)(L26)
    Replies: 7
    Last Post: 06-20-2013, 09:24 AM
  3. Failed Emissions Inspection (1st try)
    By 97gtpjoe in forum General Tech Discussion
    Replies: 25
    Last Post: 07-24-2012, 06:13 AM
  4. zzp pcm failed so im swaping to a gtp pcm
    By Wisconsingrandprix in forum 3.8L V6 Supercharged (L67)(L32)
    Replies: 11
    Last Post: 03-27-2012, 01:46 PM
  5. failed lim gaskets and you
    By 99prixgt in forum General Tech Discussion
    Replies: 5
    Last Post: 11-29-2010, 01:11 AM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules