Results 1 to 7 of 7

firbird hits fuel cutoff before shifting

This is a discussion on firbird hits fuel cutoff before shifting within the Firebird / WS6 forums, part of the Vehicle Specific category; I have a 99 firbird with auto tranny. I can take off pretty good but when i go full throttle ...

  1. #1
    Junior Member
    Join Date
    Jan 2012
    Location
    Wasco, Ca
    Posts
    6

    silver
    99 formula/ 2001 trans am

    firbird hits fuel cutoff before shifting

    I have a 99 firbird with auto tranny. I can take off pretty good but when i go full throttle it hits the cut out before shifting to second gear. is this something I can change in the computer or is it a tranny issue? fuel cutout hits at about 6800rpm. also when it does shift at higher rpm it seems like it takes a long time. any advise would be appreciated.

  2. #2
    Member chris1974's Avatar
    Join Date
    Jan 2012
    Location
    Houston
    Posts
    225

    Bright Red
    1998 Firebird Formula LS1

    I am pretty new to the Firebird family, so forgive me if I'm asking dumb questions....but what do you mean it "cuts off the fuel" in high RPMs. Also, I'm no tranny expert by any means, but if it's shifting funny, then it seems to me that something is def wrong. What do you mean it "takes a long time"? Sorry for the questions....just trying to get a better idea....

  3. #3
    Orig Regist: 9/98
    Join Date
    Sep 2005
    Location
    NE Indiana
    Posts
    535

    Black
    1998 Trans Am WS6 'Vert

    Sounds to me that someone tuned your fuel cutoff to be lower than the shift points.

    I don't have an A4, but it seems to me at 6800 RPM you are way too high for a shift when redline is about 5800. So my guess is your PCM tuning is whacked or something is seriously wrong w/ your trans.

  4. #4
    Junior Member
    Join Date
    Jan 2012
    Location
    Wasco, Ca
    Posts
    6

    silver
    99 formula/ 2001 trans am

    I just got the car and had to put all the stock goodies back on to get it smogged. including having the computer de tuned. so they probably didnt reset shift point or fuel cutout back to stock. I really dont want to rev my engine to 6800rpm, is this something I can change with the TEC 2 or do I need to take it to the guy who de tuned it? trans seems to be ok but scares me that it wont shift at WOT.

  5. #5
    Member godless-phoenix's Avatar
    Join Date
    Jan 2010
    Location
    culver city, Ca.
    Posts
    459

    Blackened fire chicken
    2000 Pontiac Trans Am WS6

    i had same issue from shifting from 2nd to 3rd because of a higher stall torque converter that was installed without a tune being done. its the rev limiter...i had a "tranny tune" done and it fixed the problem. have the tuner lower the rev limiter while hes in there tuning your shift points. 6800 shift at wot seems to high imo

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

    98 Formula
    06 duramax

    depending on the mods it could just be a tune issue....the car has definitely had a tune at some point if the limiter is that high. Probably just need the shift points adjusted.

  7. #7
    Junior Member
    Join Date
    Jan 2012
    Location
    Wasco, Ca
    Posts
    6

    silver
    99 formula/ 2001 trans am

    Thanks for the help guys. I'll just cruise it around for the few months untill I smog it again. After that , all the goodies go back on and I'll have it tuned then. good thing is theyre easy to work on.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. DFCO fuel cutoff tables?
    By Firebirdjones in forum Computer & Tuning
    Replies: 5
    Last Post: 03-13-2012, 09:33 PM
  2. Summit Racing Battery Relocation Kit And Cutoff Sw
    By Ed Blown Vert in forum Camaro / SS
    Replies: 0
    Last Post: 02-08-2010, 11:00 PM
  3. what type of firbird is best?
    By FirebirdFan10 in forum Firebird / WS6
    Replies: 30
    Last Post: 08-23-2009, 09:33 AM
  4. My '87 Firbird Formula 5.0
    By Pontiacfanatic in forum Member's Rides
    Replies: 4
    Last Post: 04-19-2009, 09:52 PM
  5. help finding a fuel cutoff switch
    By 00camaro16 in forum Stereo and Electronics
    Replies: 0
    Last Post: 11-22-2008, 08:51 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
  •