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  Soarer Central * Transmission * Revving without touching the accelerator. Previous Previous    Next Next  

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Cameron Heggie
Newbie
N.S.W.
LTD V8

Posts: 4
Reg: 05-2007

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Tuesday, January 22, 2008 - 03:58 pm, by:  Cameron Heggie (Camheggie) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Hey guys, got a bit of a problem with my 91 V8 soarer start up. When the ignition is on, and car still in park, the engine will rev to about 2.5-3000 rpm for about two seconds, then drop completely off and make a sound like its releasing some kind of compressed gas for half a second, then rev again. this doesn't stop until i put it in drive, and even then it revs at random points though not as often. It makes it hard to put it into gear as with the constant revving it jolts when drive is selected as the car is at a higher rev point than idol.
Mike Beck
Goo Roo
New Zealand
Soarer JZZ31 I6

Posts: 1838
Reg: 11-2005

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Tuesday, January 22, 2008 - 04:35 pm, by:  Mike Beck (Gold_40gt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Sounds like your Idle control valve to me. Do a search, I think theres a good tutorial on Plant soarer to clean them or repair.
Drew Rechner
Tinkerer
South Australia
JZZ30 TT

Posts: 99
Reg: 10-2007

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Tuesday, January 22, 2008 - 04:58 pm, by:  Drew Rechner (Drew1jz) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

The ghost of Christmas past maybe?????
Shane McInnes
Goo Roo
NSW
JZZ30 GT-TL Manual

Posts: 1184
Reg: 07-2005

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Wednesday, January 23, 2008 - 11:28 am, by:  Shane McInnes (Soarin_tt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Cameron Heggie wrote on Tuesday, January 22, 2008 - 03:58 pm:

Hey guys, got a bit of a problem with my 91 V8 soarer start up. When the ignition is on, and car still in park, the engine will rev to about 2.5-3000 rpm for about two seconds, then drop completely off and make a sound like its releasing some kind of compressed gas for half a second, then rev again. this doesn't stop until i put it in drive, and even then it revs at random points though not as often. It makes it hard to put it into gear as with the constant revving it jolts when drive is selected as the car is at a higher rev point than idol.





I have a TT and does a very similar thing on start up, But its very random and cant predict when its gonna do it.

Once i start driving and car is warmed up, Idle will be back to normal.

Ive assumed its something to do with Idle control valve, but ive lived with it for over 2yrs now, So im not worried anymore.
Andrew Ferres
DieHard
WA
'90 C-F Celsior V8, '84 Soarer V8, '91 Supra V8

Posts: 758
Reg: 07-2005

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Friday, January 25, 2008 - 08:52 am, by:  Andrew Ferres (Peewee) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I've had this happen for 2 reasons.

1) Battery charge is very low (happened after flat battery, roll started car) did this revving until I had been driving around for 5 mins.

2) TPS was installed incorrectly and throttle plate is jammed open.


However, I'd say both are unlikely in your case as you can start your car and drive it.

I'd start with cleaning the ISCV.

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