Page 1 of 2 12 LastLast
Results 1 to 20 of 40

everythings cool til i floor it

This is a discussion on everythings cool til i floor it within the General Help forums, part of the LSx Technical Help Section category; when i floor it about half way through third my engine light comes on the codes are 131 137 151 ...

  1. #1
    Junior Member
    Join Date
    Jun 2008
    Location
    Butler mo
    Posts
    76

    Blue
    98 Trans Am

    everythings cool til i floor it

    when i floor it about half way through third my engine light comes on the codes are 131 137 151 157 (o2 sensors) and once that happens the fuel loop closes and the torque converter wont lock up any ideas anyone. i have checked the eng sen fuse it is good

  2. #2
    I don't sell out! blackSS01's Avatar
    Join Date
    Jul 2005
    Location
    Wisconsin
    Posts
    5,558

    Black
    2001 Camaro SS M6

    Quote Originally Posted by heath26 View Post
    when i floor it about half way through third my engine light comes on the codes are 131 137 151 157 (o2 sensors) and once that happens the fuel loop closes and the torque converter wont lock up any ideas anyone. i have checked the eng sen fuse it is good
    O2's going to hell maybe
    ┌∩┐(◕_◕)┌∩┐

    Man: The Mods you are fighting,
    they are the biggest Men I have ever seen. I
    wouldn't want to fight them!

    Me: That is why no one will remember your name!

  3. #3
    Junior Member
    Join Date
    Jun 2008
    Location
    Butler mo
    Posts
    76

    Blue
    98 Trans Am

    Quote Originally Posted by blackSS01 View Post
    O2's going to hell maybe
    all 4 at the same time kinda funny i think but i guess you never know

  4. #4
    Veteran 0rion's Avatar
    Join Date
    Aug 2005
    Location
    ohio
    Posts
    22,520

    98 Formula
    06 duramax

    what are your mods?

  5. #5
    Junior Member
    Join Date
    Jun 2008
    Location
    Butler mo
    Posts
    76

    Blue
    98 Trans Am

    Quote Originally Posted by 0rion View Post
    what are your mods?
    slp loud mouth,air lid and a slp maf but i know what your gonna say the codes were poping up before it,i just got it back from trans shop last week it had been over there for about 2 months

  6. #6
    Veteran 0rion's Avatar
    Join Date
    Aug 2005
    Location
    ohio
    Posts
    22,520

    98 Formula
    06 duramax

    was it doing anything before the visit to the trans shop? Kinda odd you would get all 4 showing low voltage like that at the same time.

  7. #7
    Smiles for 9.5 Years cammed goat's Avatar
    Join Date
    Jan 2009
    Location
    Paterson/Ridgewood, NJ
    Posts
    11,474

    Phantom Black Metallic
    2004 GTO M6

    Maybe a re-tune is in order?

  8. #8
    Junior Member
    Join Date
    Jun 2008
    Location
    Butler mo
    Posts
    76

    Blue
    98 Trans Am

    it was doing it before the trans but that wasnt the first trans i shelled and i didnt want to take it to the tune shop again til it was running right. unless the tune can take it out?

  9. #9
    Smiles for 9.5 Years cammed goat's Avatar
    Join Date
    Jan 2009
    Location
    Paterson/Ridgewood, NJ
    Posts
    11,474

    Phantom Black Metallic
    2004 GTO M6

    Our cars don't really like aftermarket MAFs. That might be the cause.

  10. #10
    Veteran 0rion's Avatar
    Join Date
    Aug 2005
    Location
    ohio
    Posts
    22,520

    98 Formula
    06 duramax

    have you checked your fuel pressure and for vacuum leaks and things like that? Might get the easy stuff out of the way early.

  11. #11
    Moderator Cutlass's Avatar
    Join Date
    Apr 2008
    Location
    Madison, WI
    Posts
    6,998

    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    Here's some ideas from the GM Service manual:
    The PCM sets this DTC when the vehicle runs out of fuel.
    Heated Oxygen Sensor (HO2S) wire: Sensor pigtail may be in contact with the exhaust manifold or the exhaust system.
    An oxygen supply inside the HO2S is necessary for proper operation. The HO2S wires provides the supply of oxygen. Inspect the HO2S wires and connections for breaks or contamination.
    Test for intermittent ground in signal wire between connector and sensor.
    Lean injector(s): Perform the Injector Balance Test.
    Fuel contamination: Water near the in-tank fuel pump inlet can be delivered to the injectors. The water causes a lean exhaust and can set a DTC.
    Fuel pressure: System will be lean if fuel pressure is low.
    Exhaust leaks: An exhaust leak near the HO2S can cause a lean condition.
    Vacuum or crankcase leaks can cause a lean condition.

  12. #12
    Junior Member
    Join Date
    Jun 2008
    Location
    Butler mo
    Posts
    76

    Blue
    98 Trans Am

    Quote Originally Posted by 0rion View Post
    have you checked your fuel pressure and for vacuum leaks and things like that? Might get the easy stuff out of the way early.
    how do you check the fuel pressure i was hoping my scan tool would show it but it didnt and whats the best way to check for vacuum leaks

  13. #13
    Veteran 0rion's Avatar
    Join Date
    Aug 2005
    Location
    ohio
    Posts
    22,520

    98 Formula
    06 duramax

    Quote Originally Posted by heath26 View Post
    how do you check the fuel pressure i was hoping my scan tool would show it but it didnt and whats the best way to check for vacuum leaks
    you'll have to buy a few pressure gauge ( ~$20 and make sure you get one that'll fit GM cars) and on the end of the drivers side fuel rail there's a cap. Remove that cap and there's a shrader valve there. Should have ~58psi.

    Vacuum leaks you can check with carb cleaner or propane. Idle the engine and spray down the hoses and listen for the idle to change. Before you do that though check the pcv hose going into the throttle body on the passenger side. It likes to crack on the back side of that elbow.

  14. #14
    Junior Member
    Join Date
    Jun 2008
    Location
    Butler mo
    Posts
    76

    Blue
    98 Trans Am

    Quote Originally Posted by 0rion View Post
    you'll have to buy a few pressure gauge ( ~$20 and make sure you get one that'll fit GM cars) and on the end of the drivers side fuel rail there's a cap. Remove that cap and there's a shrader valve there. Should have ~58psi.

    Vacuum leaks you can check with carb cleaner or propane. Idle the engine and spray down the hoses and listen for the idle to change. Before you do that though check the pcv hose going into the throttle body on the passenger side. It likes to crack on the back side of that elbow.
    fuel pressure at 58 even when its to the floor or should it go up im gonna try to get enough hose to run it up somewhere i can see it when im driving to see what it does under load

  15. #15
    Senior Member Too Fast's Avatar
    Join Date
    Nov 2006
    Location
    Indianapolis
    Age
    54
    Posts
    5,170

    Black
    2000 WS6 6spd Hooker LT

    Yes the pressure needs to stay at 58 throughout WOT accelerating. I wish I had a wiring diagram handy to see if all the sensors have a common wire. It could be that when you floor it, the engine moves just enough to short a wire that all the O2s have in common. They switch ok below and above 450 mV during normal driving?

  16. #16
    Junior Member
    Join Date
    Jun 2008
    Location
    Butler mo
    Posts
    76

    Blue
    98 Trans Am

    Quote Originally Posted by Too Fast View Post
    Yes the pressure needs to stay at 58 throughout WOT accelerating. I wish I had a wiring diagram handy to see if all the sensors have a common wire. It could be that when you floor it, the engine moves just enough to short a wire that all the O2s have in common. They switch ok below and above 450 mV during normal driving?
    i dont know switching i cant watch the scanner and keep it on the road at the same time i just know that when i floor it all the sensors start reading between 30 and 50 mv and after 30 seconds of that it trips the code the fuel loop closes,the converter wont lock and the car runs like junk

  17. #17
    Senior Member Too Fast's Avatar
    Join Date
    Nov 2006
    Location
    Indianapolis
    Age
    54
    Posts
    5,170

    Black
    2000 WS6 6spd Hooker LT

    ^^^Well if it really is that lean then you have a problem. That is way lean and should be fixed promptly. Under full acceleration, the upstream O2s should always be around ~900 mV.

    Could still be a wiring issue, on the signal return wire to the PCM. That's why I said I wish I had a schematic handy, to tell you which wire it may be that is grounding/shorting.

  18. #18
    Junior Member
    Join Date
    Jun 2008
    Location
    Butler mo
    Posts
    76

    Blue
    98 Trans Am

    Quote Originally Posted by Too Fast View Post
    ^^^Well if it really is that lean then you have a problem. That is way lean and should be fixed promptly. Under full acceleration, the upstream O2s should always be around ~900 mV.

    Could still be a wiring issue, on the signal return wire to the PCM. That's why I said I wish I had a schematic handy, to tell you which wire it may be that is grounding/shorting.
    running around town they are always 800 to 900 mv and i found a wire diagram on gear chatter and there is one wire that controls all of them its a pink wire #539 the more i think about it the more i think its the fuel system not the sensors you would think that a big bump would shake things around enough to make it short but it never does only when you floor it

  19. #19
    Junior Member
    Join Date
    Jun 2008
    Location
    Butler mo
    Posts
    76

    Blue
    98 Trans Am

    just been cruisin town not runnin the car hard at all my engine light comes on and now it giving 171 174 (lean bank 1 and 2) no vac leaks that i can find and i remember hearing my fuel pump gets loud after long trips like 150 200 miles straight. didnt throw the o2 sensors this time

  20. #20
    Moderator Cutlass's Avatar
    Join Date
    Apr 2008
    Location
    Madison, WI
    Posts
    6,998

    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    it might be that SLP MAF
    Lean on both banks could be a MAF problem, low fuel pressure, or vacuum leak.

Page 1 of 2 12 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Help: Wet Floor Pan
    By fan4LS1 in forum General Help
    Replies: 15
    Last Post: 01-28-2012, 09:49 PM
  2. So cool. But will get ya in trouble.Cool Program
    By Hi-Po in forum Almost Anything Goes
    Replies: 18
    Last Post: 03-27-2009, 01:01 PM
  3. pedal 2 floor
    By petercar06 in forum Manual Transmission
    Replies: 8
    Last Post: 04-28-2008, 12:07 PM
  4. WTB 97-99 TA Floor Mats
    By 9c1ny in forum Parts Wanted / Trade
    Replies: 0
    Last Post: 02-14-2008, 05:56 PM
  5. one punch hit the floor
    By snaggeltooth in forum Multimedia Section
    Replies: 5
    Last Post: 04-19-2007, 06:41 PM

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
  •