Page 1 of 2 12 LastLast
Results 1 to 20 of 22

98 z is sluggish

This is a discussion on 98 z is sluggish within the General Help forums, part of the LSx Technical Help Section category; my 98 z is somtimes sluggish on take off and at lower rpm. barely will run but at 3000 and ...

  1. #1
    Junior Member phil85's Avatar
    Join Date
    Nov 2010
    Location
    ky
    Posts
    20
    1998 z28

    98 z is sluggish

    my 98 z is somtimes sluggish on take off and at lower rpm. barely will run but at 3000 and up comes alive and screams, this doesnt happen every time i drive it, only every so often. o2 codes come up somtimes. could it be the cats or the o2's or both?

  2. #2
    Member SSickLS1's Avatar
    Join Date
    Jan 2011
    Location
    Long Island
    Posts
    136

    Sunset Orange Metallic
    2002 Camaro SS

    it can be both, try cleaning ur TB and MAF as well. are you running a gm o2 sensor or aftermarket?

  3. #3
    Junior Member phil85's Avatar
    Join Date
    Nov 2010
    Location
    ky
    Posts
    20
    1998 z28

    i have no idea what they are, the original owner done some exhaust work so no idea, i cleaned the maf and it ran amazing for about 100 miles and started the same thing again,but not as bad

  4. #4
    Senior Member TLS_Addict's Avatar
    Join Date
    Mar 2008
    Location
    PA
    Posts
    1,706

    Ray Charles blue
    1492

    What filter does it have? Is it a K&N and have you oiled it lately?

    Does the car stumble or just seem powerless at low RPMs?

  5. #5
    Junior Member phil85's Avatar
    Join Date
    Nov 2010
    Location
    ky
    Posts
    20
    1998 z28

    k&n ive not drove enough to oil it less than 500 milesnand yes falls on its face at low rpm,then around 3k comes alive

  6. #6
    Senior Member TLS_Addict's Avatar
    Join Date
    Mar 2008
    Location
    PA
    Posts
    1,706

    Ray Charles blue
    1492

    Maybe the prior owner did and its cloggin up your MAF after you drive a bit? You said it runs well and then does it again.

  7. #7
    Junior Member phil85's Avatar
    Join Date
    Nov 2010
    Location
    ky
    Posts
    20
    1998 z28

    yea,after a maf cleaning it runs great

  8. #8
    Senior Member TLS_Addict's Avatar
    Join Date
    Mar 2008
    Location
    PA
    Posts
    1,706

    Ray Charles blue
    1492

    I take it you just bought the car less than 500 miles ago?

    I would clean the maf again and if it does it again you MAY have your answer.

  9. #9
    Senior Member JayTA98's Avatar
    Join Date
    Dec 2007
    Location
    Orlando, FL
    Posts
    3,351

    Mean Black
    1998 Trans Am

    Quote Originally Posted by TLS_Addict View Post
    I take it you just bought the car less than 500 miles ago?

    I would clean the maf again and if it does it again you MAY have your answer.
    I will try that. Clean it again and see if it runs fine. If it does go ahead and replace the KN filter with a paper one. Is possible the filter was over oiled and its getting on the MAF.

  10. #10
    Junior Member phil85's Avatar
    Join Date
    Nov 2010
    Location
    ky
    Posts
    20
    1998 z28

    i will do that, after looking i dont see any cats so i know they are not bad! could there be any other problems

  11. #11
    Senior Member JayTA98's Avatar
    Join Date
    Dec 2007
    Location
    Orlando, FL
    Posts
    3,351

    Mean Black
    1998 Trans Am

    Quote Originally Posted by phil85 View Post
    i will do that, after looking i dont see any cats so i know they are not bad! could there be any other problems
    Did you reset the codes and the O2 sensors keep coming up?

  12. #12
    Junior Member phil85's Avatar
    Join Date
    Nov 2010
    Location
    ky
    Posts
    20
    1998 z28

    yes, almost as soon as i clear them.

    i see that as a problem,no cats but o2's

  13. #13
    Senior Member JayTA98's Avatar
    Join Date
    Dec 2007
    Location
    Orlando, FL
    Posts
    3,351

    Mean Black
    1998 Trans Am

    Quote Originally Posted by phil85 View Post
    yes, almost as soon as i clear them.

    i see that as a problem,no cats but o2's
    the car can be run without cats but if you have a bad O2 it will cause issues. How many miles in the car? Clean the MAF 1st and if the problem is gone then you know is the MAF getting oiled. If the problem is still there then maybe you have one or more bad O2 sensors. What codes are you getting?

    If the previous owner did it right he should have tuned out the rear O2 sensors. Once you know which bank is the one giving issues you can try swaping the front sensor with a rear one. They are the same. If the problem is one of the sensors it will show a new O2 sensor code because you changed its location.

  14. #14
    Junior Member phil85's Avatar
    Join Date
    Nov 2010
    Location
    ky
    Posts
    20
    1998 z28

    shows low voltage and a no activity code for bank 1 and 2

  15. #15
    Senior Member JayTA98's Avatar
    Join Date
    Dec 2007
    Location
    Orlando, FL
    Posts
    3,351

    Mean Black
    1998 Trans Am

    Quote Originally Posted by phil85 View Post
    shows low voltage and a no activity code for bank 1 and 2
    Ok clean the MAF and if is still happening swap the O2 sensors if you have 4 in the exhaust. If you anly have 2 then they were removed and plugged. you will need to get new ones. Also check the wiring that goes to them. Make sure its not rubbing or melt against the exhaust. keep us posted.

  16. #16
    Junior Member phil85's Avatar
    Join Date
    Nov 2010
    Location
    ky
    Posts
    20
    1998 z28

    i think it only has 2, ill run it up on the lift when i get home and see for sure.

    thanks for the advice too! i'll keep you updated

  17. #17
    rsg98Z28 rsg98Z28's Avatar
    Join Date
    Dec 2007
    Location
    Atlanta, GA
    Posts
    90

    Black
    1998 Camaro Z28 vert

    it may not be getting power to the sensors, for some particular reason, definitely check for chaffed wires, or it could possibly be coincidentally two bad O2 sensors

  18. #18
    Junior Member
    Join Date
    Apr 2011
    Location
    syracuse ny
    Posts
    21

    black
    2000 trans am

    I second cleaning the TB and MAF, and its easy to do.

  19. #19
    Mustang Eater Ls_won's Avatar
    Join Date
    Feb 2010
    Location
    Springfield, Missouri, United
    Posts
    221

    Maroon
    2000 z28 6 speed

    When i deleted my cats it ran like crap and when you got on it it came alive, i had frost tune my ecu and that fixed the problem. Also when you turn off those codes with what i assume you are using is a code reader, the computer still reads a code it just doesnt show up on your dash.

  20. #20
    Member Badass WS6's Avatar
    Join Date
    Oct 2009
    Location
    A, A
    Posts
    375

    Pewter
    2002 Trans Am WS6

    Possibly bad fuel filter or fuel pump??

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. Sluggish in low rpms
    By Rhinohuey in forum General Help
    Replies: 12
    Last Post: 03-15-2009, 03:11 PM
  2. Sluggish acceleration?
    By onetroubledguy in forum General Help
    Replies: 23
    Last Post: 03-10-2009, 05:33 PM
  3. Sluggish
    By venom98 in forum General Help
    Replies: 22
    Last Post: 10-27-2007, 08:38 PM
  4. Sluggish LS1, WHY!!!!
    By Chicago TDP in forum General Help
    Replies: 12
    Last Post: 08-20-2007, 08:29 AM
  5. Idle problems, car seems very sluggish
    By sills1 in forum General Help
    Replies: 4
    Last Post: 01-14-2007, 12:34 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
  •