Jump to content


Photo

Throttle jammed wide open


  • Please log in to reply
16 replies to this topic

#1 Cdr Zero

Cdr Zero

    Advanced Member

  • Members
  • PipPipPip
  • 454 posts
  • Location:A.C.T.

Posted 23 July 2008 - 09:35 AM

Hi guys, this morning my z tried to kill me.    ;D

I was driving away from a traffic light and gave it a bootful to get into the exit slip lane to work.  When I took my foot off the accelerator it wouldn't come back up.  This scared the crap out of me and I thumped it a few times, and took the car out of gear so I wouldn't crash full tilt into the cars and wall in front of me.  The tacho registered over 7 grand for a few seconds and it sounded like the end of the world.  I thought "Oh boy, if I don't die in a fire I'm going to be up for a new engine."  The accelerator came up just as I was thinking this and I drove - carefully - into work.

The car is in canberra and it had been outside overnight in the frost.  I didn't like it just the same as you but I had no choice, I live with my parents and my dad needed the garage to do work for his business.  (Rarely happens).

The engine seems to be okay, I left it running for a few minutes when I got to work with the bonnet up to try and cool it down a bit, turned it off and left the bonnet up for about 5 minutes.  Still sounded okay but I was wondering, how does this happen and how do I fix it?  I won't be going full throttle until I'm sure this won't happen again.  :P

Cheers

#2 Scoota G

Scoota G

    The 2000+ club

  • Members
  • PipPipPipPipPipPipPip
  • 4,213 posts
  • Location:Ballarat
  • Tagline:Mark

Posted 23 July 2008 - 09:47 AM

Ouch'o

I actually had this happen in one of my Datsun's years ago. It was the Accelerator linkage catching on a screw.

If i were you i would try to recreate the incident with the engine switched off of course... get a freind to press the accelerator while you inspect it from the outside and also check under the dash for possible snags.

Other than that it could be some gunk built up around the throttle shafts, disassembling and cleaning them might be a wise move too.

Then again as we know metal shrinks when it's cold so it might just be as simple as warmin her up some more.

Hope this helps.

#3 260Coupe

260Coupe

    Senior Member

  • Members
  • PipPipPipPipPip
  • 596 posts

Posted 23 July 2008 - 10:01 AM

Ensure the "J" shaft is installed correctly into the throttle clevis (this is the connection with the spring/washer and split pin) .................and that your carpet/mat is well clear of the gas pedal.

#4 Cdr Zero

Cdr Zero

    Advanced Member

  • Members
  • PipPipPip
  • 454 posts
  • Location:A.C.T.

Posted 23 July 2008 - 11:36 AM

Thanks for the help guys, I'll take a look tonight and make sure everything's squared away. :)

#5 Scando

Scando

    Senior Member

  • Members
  • PipPipPipPipPip
  • 932 posts
  • Location:Southern TAS

Posted 23 July 2008 - 12:41 PM

If everything seems to be fine then it wouldn't hurt to spray some CRC, Inox, etc around all the linkages to makes sure they're all moving freely.

#6 Lynton

Lynton

    Senior Member

  • Members
  • PipPipPipPipPip
  • 537 posts
  • Location:Sunshine Coast Queensland

Posted 23 July 2008 - 03:18 PM

Yeah check all the linkages with engine off and then flatten the accelerator to see what it is catching on, possibly a spacer on the wrong side of a linkage shaft, the carpet on the floor not letting your accelerator return, or the linkage catching on the choke cables?

Next time you are in motion like that and the throttle jams on full, turn the ignition off and hit the brakes and get into the breakdown/service lane

Just my 2 cents worth, better than blowing up your motor at 7 grand
Lynton

#7 Cdr Zero

Cdr Zero

    Advanced Member

  • Members
  • PipPipPip
  • 454 posts
  • Location:A.C.T.

Posted 23 July 2008 - 03:38 PM

Sound advice about turning the ignition off, I'll remember that and if it happens again I'll kill it. 

Your help is appreciated guys. :)

#8 sco_aus

sco_aus

    The 2000+ club

  • Members
  • PipPipPipPipPipPipPip
  • 2,484 posts
  • Location:Canberra, ACT
  • Tagline:Scott

Posted 23 July 2008 - 04:15 PM

Does the pedal actually return, or does it stay on the floor?  There is a lot of crap up in there that it can catch on.  Im happy to come and lend a hand if you need, im always keen to meet new people and zeds.  I have every day off this week too.
Which end of town are you on?

#9 Cdr Zero

Cdr Zero

    Advanced Member

  • Members
  • PipPipPip
  • 454 posts
  • Location:A.C.T.

Posted 23 July 2008 - 04:52 PM

It returns fine, but I've noticed it was a bit "sticky" when I put my foot right down.  I haven't really taken much notice of it since I don't do it very often - it's not the sort of car you thrash to death.

I'm up north in Nicholls, Gungahlin.  I'll see if I can clear out the gremlins tonight, if there's no joy I know I can call on you sco_aus.  :)

#10 sco_aus

sco_aus

    The 2000+ club

  • Members
  • PipPipPipPipPipPipPip
  • 2,484 posts
  • Location:Canberra, ACT
  • Tagline:Scott

Posted 23 July 2008 - 04:54 PM

oh ok, cool.  Let me know, but i doubt it would have frozen, i mean its cold here and all, but it aint that cold. :D

#11 pauly_adams

pauly_adams

    The 1000+ club

  • Members
  • PipPipPipPipPipPip
  • 1,160 posts
  • Location:Albury NSW

Posted 23 July 2008 - 05:15 PM

lol my z tyred to kill me today too. early this avo i re kitted my carby due to many problems any way long story short it backfired spraying fuel every where and all over me my gf was in the car, then my girlfriend continued to turn the key and it backfired again setting my carby, engine and my jumper on fire i was smart enough to close the choke which stopped the source of the fire and then extinguished the rest of the fire lucky nothing was damaged. dam our zeds and there need too try and kill us lol.


cheers pauly

#12 tbscobraZ

tbscobraZ

    Advanced Member

  • Members
  • PipPipPip
  • 295 posts
  • Location:Sydney- Normanhurst

Posted 23 July 2008 - 05:44 PM

The devil z has had children by the sound of it, lol.


#13 Cdr Zero

Cdr Zero

    Advanced Member

  • Members
  • PipPipPip
  • 454 posts
  • Location:A.C.T.

Posted 23 July 2008 - 06:00 PM

Ok managed to recreate the problem, the accelerator pedal was catching on a little bump in my carpet. Such a small thing can cause such drama.  :-[

Thankyou for your help everyone.  Looking forward to catching up with you on the meet in August sco_aus.  :)

#14 sco_aus

sco_aus

    The 2000+ club

  • Members
  • PipPipPipPipPipPipPip
  • 2,484 posts
  • Location:Canberra, ACT
  • Tagline:Scott

Posted 23 July 2008 - 06:12 PM

good to hear.  Definately, oh and I have convinced another guy called Michael to come along too, he has red 240 with RB20.

#15 Zedman240®

Zedman240®

    The 2000+ club

  • Moderators
  • PipPipPipPipPipPipPip
  • 5,198 posts
  • Location:Way out SE Melbourne
  • Tagline:I want your old SHOGUN bike! PM me now...

Posted 23 July 2008 - 08:08 PM

With these sort of thing happening occasionally, makes you think of installing a rev limiter in case of anything happening in future! One of those babies can prevent major engine damage! Lucky nothing was damaged, just a small case of valve bounce!

#16 Scando

Scando

    Senior Member

  • Members
  • PipPipPipPipPip
  • 932 posts
  • Location:Southern TAS

Posted 24 July 2008 - 01:01 PM

It happened to a guy that races a Z here in Tas and he's just had to do a complete rebuild because of it!

He's installing a rev limiter now.

#17 sco_aus

sco_aus

    The 2000+ club

  • Members
  • PipPipPipPipPipPipPip
  • 2,484 posts
  • Location:Canberra, ACT
  • Tagline:Scott

Posted 24 July 2008 - 01:01 PM

I love having a computer to run my engine now :D




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users