Thread: need some info and help.

Results 1 to 14 of 14
  1. #1 need some info and help. 
    SE Level Member
    Join Date
    Jan 2016
    Location
    VA
    Posts
    12
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Chats
    0
    hey guys,

    i have a 95 pontiac grand prix with 3.1 engine.

    this just started out of the blue,

    problem

    the car started to miss fire under load, like if you hold the brake and give it gas it will miss pretty bad like shake the car and you can hear it out the tail pipe. also it only dose this under load, once going its find untill (2nd problem) you hit 2nd gear and around about 3k rpm it will lose power, like you can feel and see it on the tach struggle to gain speed,it will gain speed but you can feel and see somthing is holding it back

    i cant pull codes,never could. anyone got any tips or ideas?
    Reply With Quote  
     

  2. #2 Re: need some info and help. 
    GrandPrix Junkie
    Join Date
    Oct 2009
    Location
    St. Louis
    Posts
    4,724
    Thanks (Received)
    18
    Likes (Received)
    75
    Dislikes (Received)
    0
    Chats
    0
    when's the last time it had new plugs and wires? How many miles are on the car?
    Reply With Quote  
     

  3. #3 Re: need some info and help. 
    GT Level Member
    Join Date
    Mar 2018
    Location
    NY
    Posts
    173
    Thanks (Received)
    2
    Likes (Received)
    3
    Dislikes (Received)
    0
    Chats
    0
    When was the last time you changed your spark plugs & wires? That's the first thing that comes to my mind
    Reply With Quote  
     

  4. #4 Re: need some info and help. 
    GT Level Member mguzzo's Avatar
    Join Date
    Dec 2007
    Location
    Buffalo NY
    Posts
    483
    Thanks (Received)
    8
    Likes (Received)
    27
    Dislikes (Received)
    0
    Chats
    25
    clogged cat?
    --
    "Silver Bullet" 98 GTP Coupe: Stock, rust free, and broadsided.
    Old '98 GTP Coupe: VS Cam, 3.0, S2IC, 42.5#, TOGs, N*/LQ4, Corsa. it once ran a 13 flat
    Older '98 GTP Sedan: Pullied, rockered, SSIC, etc. Stock 14.33 @ 96.5 / PB: 13.89 @ 101
    Reply With Quote  
     

  5. #5 Re: need some info and help. 
    GT Level Member
    Join Date
    Apr 2014
    Location
    commerce twp,mi
    Posts
    299
    Thanks (Received)
    3
    Likes (Received)
    21
    Dislikes (Received)
    0
    Chats
    0
    Quote Originally Posted by digitalgpbandit View Post
    When was the last time you changed your spark plugs & wires? That's the first thing that comes to my mind
    and fuel filter
    08 grand prix NA3800
    Reply With Quote  
     

  6. #6 Re: need some info and help. 
    SE Level Member
    Join Date
    Jan 2016
    Location
    VA
    Posts
    12
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Chats
    0
    i just came in from replaceing the sparkplugs and fuel filter.

    how can you test if the cat is bad?
    Reply With Quote  
     

  7. #7 Re: need some info and help. 
    SE Level Member
    Join Date
    Jan 2016
    Location
    VA
    Posts
    12
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Chats
    0
    dang it, the plugs and fuel filter didnt help.
    Reply With Quote  
     

  8. #8 Re: need some info and help. 
    SE Level Member
    Join Date
    Jan 2016
    Location
    VA
    Posts
    12
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Chats
    0
    sparkplugs and wires,fuel filter, and tps didnt work. lol
    Reply With Quote  
     

  9. #9 Re: need some info and help. 
    Donating Users bandook's Avatar
    Join Date
    Apr 2015
    Location
    Columbus, OH
    Posts
    1,781
    Thanks (Received)
    2
    Likes (Received)
    27
    Dislikes (Received)
    0
    Chats
    246
    You really need codes. Does check engine light blink? Check fuse for obd2 port. Are all cylinders firing? On cold start you can carefully feel which ones are warming up.
    Top Swapped 01 Imp
    VS (very small?) cam, SD Headers, 2.8" pulley, 29°, ported everything, E85, AEM water/meth, Deka 60's, HPT tuned
    Reply With Quote  
     

  10. #10 Re: need some info and help. 
    SE Level Member
    Join Date
    May 2020
    Location
    Pittsburgh
    Posts
    59
    Thanks (Received)
    6
    Likes (Received)
    8
    Dislikes (Received)
    0
    Chats
    0
    Typically a bad cat will get worse as it gets hotter. You can also tell by the temperature difference before and after the cat after running 5min or so. It should be within roughly 20*, from inlet to outlet. If it's plugged it'll be substantially hotter on inlet side.
    Reply With Quote  
     

  11. #11 Re: need some info and help. 
    SE Level Member
    Join Date
    Jan 2016
    Location
    VA
    Posts
    12
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Chats
    0
    Quote Originally Posted by bandook View Post
    You really need codes. Does check engine light blink? Check fuse for obd2 port. Are all cylinders firing? On cold start you can carefully feel which ones are warming up.
    cant check codes, its the obd 1.5, no body has one around where im at
    Reply With Quote  
     

  12. #12 Re: need some info and help. 
    GrandPrix Junkie
    Join Date
    Oct 2009
    Location
    St. Louis
    Posts
    4,724
    Thanks (Received)
    18
    Likes (Received)
    75
    Dislikes (Received)
    0
    Chats
    0
    Well, if you want to invest some money in a scanner I know my older Actron will read OBD 1.5 codes. In fact I bought it for that exact reason so I could scan my 95 Bonneville. I can give you the model# if you want to look for one. Works on OBD II stuff to up until the canbus stuff came into play.
    Reply With Quote  
     

  13. #13 Re: need some info and help. 
    SE Level Member
    Join Date
    Jan 2016
    Location
    VA
    Posts
    12
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Chats
    0
    Quote Originally Posted by FordMan77 View Post
    Well, if you want to invest some money in a scanner I know my older Actron will read OBD 1.5 codes. In fact I bought it for that exact reason so I could scan my 95 Bonneville. I can give you the model# if you want to look for one. Works on OBD II stuff to up until the canbus stuff came into play.
    yes please,
    Reply With Quote  
     

  14. #14 Re: need some info and help. 
    GrandPrix Junkie
    Join Date
    Oct 2009
    Location
    St. Louis
    Posts
    4,724
    Thanks (Received)
    18
    Likes (Received)
    75
    Dislikes (Received)
    0
    Chats
    0
    Actron CP9145 Super AutoScanner.

    I would verify that it will work on the GP but I don't see why not. I just plugged mine into my 00 GP and set it to read codes for a 95 GP with the 3.1 and 4t60 trans and it was ready to go. In fact there were 3 options for a 95 GP it listed.
    Reply With Quote  
     

Similar Threads

  1. Top Swap Info and Faqs, Also lots of 3800 Info
    By 02BlueGT in forum 3.8L V6 Naturally Aspirated (L36)(L26)
    Replies: 436
    Last Post: 07-07-2022, 02:44 PM
  2. first days!!! any info of good info
    By 97gtp83boy in forum Introductions/Noob Questions
    Replies: 5
    Last Post: 02-24-2013, 02:17 AM
  3. Info please?
    By Bluemagic in forum General Grand Prix Discussion
    Replies: 14
    Last Post: 02-21-2013, 01:40 AM
  4. Does anyone know more info about the HV3?
    By JESSEGOTTA GP GT in forum Off Topic Discussion
    Replies: 23
    Last Post: 01-12-2010, 01:48 PM
  5. Need some info on LCA's
    By SyntheticShield in forum Brakes/Suspension/Chassis
    Replies: 5
    Last Post: 09-03-2008, 06:34 PM
Tags for this Thread

View Tag Cloud

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
  •