Results 1 to 5 of 5

Running rich & tuner can't figure out why....

This is a discussion on Running rich & tuner can't figure out why.... within the Computer & Tuning forums, part of the LSx Technical Help Section category; NOOB as far as forums, haven't been on one is over a decade so... Just rebuilt my 98 TA. Running ...

  1. #1
    Junior Member
    Join Date
    Nov 2019
    Location
    Mesa, AZ
    Posts
    3

    Bright Green Metallic
    1998 Trans Am

    Running rich & tuner can't figure out why....

    NOOB as far as forums, haven't been on one is over a decade so... Just rebuilt my 98 TA. Running a 228 / 232 .600" 114 LSA cam, LS6 heads, ported, milled .030, forged bottom end, approx 11.3:1 compression. FAST 92mm intake & TB. and and LS2 style MAF. Fuel Pressure is a consistent 60psi across the power band. and 36# injectors rated at 36psi @ 43.5 psi fuel pressure. Not punched out past a normal machining process.. so... 350cid? And about 1700 miles on the engine.

    At idle @ 930 rpms:
    MAF: 1.65 lb/m
    MAP: 13.9 "HG
    Front o2s: .755 .790
    "rear" o2s (bypassed): .450 .450
    Abslt TPS%: .4
    Calc load%: 4.3
    Coolant: 189'
    Fuel sys 1/2: closed
    IAT: 111'
    ST FTRM1%: -29.7
    ST FTRM2%: -25.8 PIG RICH on these... I know....
    ST FTRM11%: -28.1
    ST FTRM21%: -25.0

    injectors and fuel pressure regulator / pump are all new... To me it just seems the fuel map is too rich to begin with... from my research all my telemetry makes sense but... why is it running so rich to begin with? Thank you in advance.

  2. #2
    Spaz is My Mentor SMWS6TA's Avatar
    Join Date
    Feb 2009
    Location
    Ugy Lower Corner of AL
    Posts
    11,411

    Navy Blue Metallic
    98 T/A w/ mods, 00 FBVert

    Is it running rich all the time or until the O2 sensors kick in and start adjusting the tables?


    Also is this a real tuner or someone that does it as a hobby?

    Not trying to insult anyone, just that I've seen a few too many ppl having HPTuners or Holly EFILive claming they are tuners and know nothing beyond the basic functions.
    Last edited by SMWS6TA; 11-22-2019 at 07:52 AM.

  3. #3
    Junior Member
    Join Date
    Nov 2019
    Location
    Mesa, AZ
    Posts
    3

    Bright Green Metallic
    1998 Trans Am

    Tuning was done through a local shop with a good reputation on a dyno I know the owner, ironically I used to whoop his ass in the early 2000s with the same car. I believe it’s rich all across the power band as I’m also only getting 15mph. I haven’t looked at the trims under load. I think I’ll do that now.

  4. #4
    Spaz is My Mentor SMWS6TA's Avatar
    Join Date
    Feb 2009
    Location
    Ugy Lower Corner of AL
    Posts
    11,411

    Navy Blue Metallic
    98 T/A w/ mods, 00 FBVert

    How old are the O2 sensors?

  5. #5
    Junior Member
    Join Date
    Nov 2019
    Location
    Mesa, AZ
    Posts
    3

    Bright Green Metallic
    1998 Trans Am

    Quote Originally Posted by SMWS6TA View Post
    How old are the O2 sensors?
    Brand new, well... 4 months old and 1700 miles on them. Bosch. Basically EVERYTHING in the entire drivetrain is new minus the block, crank, and gearbox.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Question: running to rich
    By reaper ws6 in forum General Help
    Replies: 8
    Last Post: 02-08-2011, 09:07 PM
  2. Question: running rich?
    By BlairF in forum V6
    Replies: 7
    Last Post: 10-12-2010, 09:13 AM
  3. My ls1 is running way rich
    By 69LS1velle in forum General Help
    Replies: 10
    Last Post: 05-26-2010, 12:58 PM
  4. Running very rich
    By cm1273 in forum Computer & Tuning
    Replies: 2
    Last Post: 09-10-2009, 11:52 AM
  5. Running WAY Rich
    By Krazy351w in forum General Help
    Replies: 6
    Last Post: 06-05-2007, 10:28 AM

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
  •