Engine wants to rev out when past 4000 RPM

Discussion in 'Technical' started by Cool300ZX, Oct 3, 2009.

  1. Cool300ZX

    Cool300ZX Tasmanian Zed

    Hi all

    When my Zed gets to about 4000+ in 1st/2nd gear it just revs out to the limiter/red line. It feels like clutch slip because car is reving but not going any faster. This only happens when I "stamp" on the go pedal in 1st or 2nd.

    I live on a steep hill but driving up the hill in 2nd gear at 2500-3000 rpm NO problems or when driving in 5th at the speed limit (110kph in Tas) no problems.

    Only when I "stamp" on the go pedal and get to about 4000+ rpm that the tacho goes straight to rev limt like it's slipping but Zed is not going faster.

    As I then go up through the gear ranges 2nd, 3rd to 4th the engine/tacho/still wants to rev out but the revs settle down in 4th or 5th gear and Zed is perfect again.

    Can a clutch slip at the higher rev range but not down low?.
    My Zed has a Heavy Duty Exedy clutch when it was advertised for sale, not sure if they have this issue or if I look else where in car.

    I've had 2 searchs on the forum. Clutch slip something about "glazing" and over revving something about the "clutch pedal adjustment" but nothing I could see that was particular to my issues.

    Cheers
    Pete
     
    Last edited: Oct 3, 2009
  2. ZEDZY

    ZEDZY Active Member

    Your clutch may need adjusting or replacing.


    you start to make boost at 3000-4000 rpm, torque goes up and the clutch slips.
     
  3. zx299

    zx299 Well-Known Member

    Put a block in front of your wheel.....

    That will soon sort out if you have a dodgey clutch. If your clutch is okay the car will try to mount the block or your engine will stall.

    If you have a healthy TT, flooring the throttle at 3.5K in the 1st 3 gears will invoke large amounts of "traction minimisation" (also known as going sideways up the street) :eek:
     
  4. Cool300ZX

    Cool300ZX Tasmanian Zed

    That worked

    Stuck a bloody big brick under front wheel. Zex tried to mount it (failed that) but the Zed never stalled..Zed just kept trying to mount the brick.. ??
     
  5. Cool300ZX

    Cool300ZX Tasmanian Zed

    Feel I may have "glazed" my clutch

    Had a search and my symptoms seem to indicate I've "glazed" my clutch.

    I might try to deglaze it.
     
  6. zedman

    zedman Member

    if your going to drop the box you may as well put in a new clutch.
    thats what i would do.
     
  7. 5K1TZX

    5K1TZX Its all never ending....

    if your local I can check it out for you???
     
  8. MagicMike

    MagicMike Moderator Staff Member

    Use a bigger brick :)

    Clutch is on the out for sure :(
     
  9. AndyMac

    AndyMac Better than you

    Yes and after that you can guarantee a buggered clutch :bash: :rolleyes:
     
  10. IANZX

    IANZX New Member

    yup...the flywheel contact area might look like a mirror. sounds like galzed surface area
     

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