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  Soarer Central * Mechanical - TT * General Mechanical * Low idle * Archive through February 28, 2007 Previous Previous    Next Next  

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Alan Chow
Tinkerer
Vic
TT

Posts: 15
Reg: 09-2005

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Sunday, September 11, 2005 - 04:49 pm, by:  Alan Chow (Kfchow) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

hrmmm my cars been idling at 600 when i'm in drive and 700 in park. Also when its cold i can feel the engine kind of.. well the best way i can describe it is... choke.. feels like the engines gonna die every 5 seconds... but when it warms up its ok... any ideas guys?
Sam Schreck
TryHard
ACT
vvt-i JZZ31

Posts: 176
Reg: 07-2005

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Sunday, September 11, 2005 - 05:40 pm, by:  Sam Schreck (Schreck300) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Mine sits at 6-700 idle all the time, drive or neutral. 600 more often. What does yours normally sit at?
Alan Chow
Tinkerer
Vic
TT

Posts: 18
Reg: 09-2005

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Sunday, September 11, 2005 - 05:54 pm, by:  Alan Chow (Kfchow) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

it used to sit at 700 spot on. now it sits at 600.. but when i put it into park.. it goes upto 700... wierd
Daniel Lee
TryHard
Victoria
Soarer GT Limited UZZ31 V8

Posts: 206
Reg: 07-2005

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Sunday, September 11, 2005 - 05:56 pm, by:  Daniel Lee (Son_gokou) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Mine also sits at 600-700 for idle and just over 1000 in park..

But when i turn the air-con on, its idling around 900-1000...
David Vaughan
TryHard
ACT
Soarer GT-L (4.0 V8) Lexus is300 (3.0 VVT-i 6)

Posts: 428
Reg: 07-2005

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Sunday, September 11, 2005 - 06:06 pm, by:  David Vaughan (Davidv) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

So, your cars normally idle around 600-700 RPM, toward the top end when there is no load (Park or Neutral) and dropping a little when you put it in Drive. Then, when you turn on the AC the revs rise to meet the load.

Alan's engine sounds like it might need a bit of a tune -- fuel or electrics.

Deeply troubling, all these normal things.
Alan Chow
Tinkerer
Vic
TT

Posts: 21
Reg: 09-2005

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Sunday, September 11, 2005 - 06:06 pm, by:  Alan Chow (Kfchow) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

yeah aircon makes it go up but mines broken:P... 1000 in park is crazy daniel.. is that with aircon on? i certainly hope so.

but i'm more worried about the fact that my car feels like its dying when its cold. it never used to do that:-(

how to explain.. hrmmm... when i'm at the lights i can feel my car bump every 5 or 10 seconds as if it were choking on something
Dan McColl
TryHard
Victoria
UZZ32 V8 Soarer #183

Posts: 92
Reg: 07-2005

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Sunday, September 11, 2005 - 09:02 pm, by:  Dan McColl (Hoon) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Its possible that its a s simple as a cracked/perished vacumn line or something like that, thus giving false readings to the computer??
Alan Chow
Tinkerer
Vic
TT

Posts: 23
Reg: 09-2005

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Sunday, September 11, 2005 - 09:34 pm, by:  Alan Chow (Kfchow) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

hrmmm... i'll take a look
Alan Chow
Tinkerer
Vic
TT

Posts: 27
Reg: 09-2005

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Monday, September 12, 2005 - 05:28 pm, by:  Alan Chow (Kfchow) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

hrmmm seems fine to me... anymore ideas?
Richard Tan
TryHard
NSW
Turbo

Posts: 86
Reg: 07-2005

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Monday, September 12, 2005 - 05:55 pm, by:  Richard Tan (Ric) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Alan , do you mean every few seconds you see the idle jump up a bit with a slight knockin sound?
Daniel Lee
TryHard
Victoria
Soarer GT Limited UZZ31 V8

Posts: 209
Reg: 07-2005

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Monday, September 12, 2005 - 06:40 pm, by:  Daniel Lee (Son_gokou) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Alan,

1000 RPM in park for me that with air-con off...
Alan Chow
Tinkerer
Vic
TT

Posts: 29
Reg: 09-2005

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Monday, September 12, 2005 - 06:43 pm, by:  Alan Chow (Kfchow) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

nah richard.. the idle stays at 600 but but u feel the car kinda bump a bit... can't explain it... will show u guys at the next cruise. and daniel man 1000rpms is really high man.
Benny Gammelmark
TryHard
NSW
V8 UZZ31

Posts: 671
Reg: 07-2005

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Monday, September 12, 2005 - 07:46 pm, by:  Benny Gammelmark (Oldfield) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Mine idles at 800rpm with aircon on. About 700rpm with it off.

I know what you mean about the bumping Alan, I've felt it in mine a couple of times, just can't remember when.
It's not missing is it? It sounds as if it's running a bit "uneven" at idle if that's the word.

Maybe the v8 idles a bit higher than the TT?
Alan Chow
Tinkerer
Vic
TT

Posts: 31
Reg: 09-2005

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Monday, September 12, 2005 - 08:22 pm, by:  Alan Chow (Kfchow) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

what do you mean by íts not missing'??? hrmmm i guess yeah a bit uneven... like the engine will be idling and suddenly it'll spike and go bump... even though the revs don't go up or down on the rev meter....
Benny Gammelmark
TryHard
NSW
V8 UZZ31

Posts: 677
Reg: 07-2005

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Monday, September 12, 2005 - 08:32 pm, by:  Benny Gammelmark (Oldfield) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Missing: Misfire on a cylinder once in a while.
Alan Chow
Tinkerer
Vic
TT

Posts: 32
Reg: 09-2005

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Monday, September 12, 2005 - 09:00 pm, by:  Alan Chow (Kfchow) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

errr.. how can i tell??? and if it was misfiring wouldn't it always happen? and not only when its cold
Cliff Newton
Tinkerer
W.A.
TT

Posts: 14
Reg: 07-2005

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Monday, September 12, 2005 - 10:21 pm, by:  Cliff Newton (Tiger_x) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Try an ECU reset, see if that helps.
Freeman Tang
TryHard
Vic
JZZ30 GT-TL

Posts: 56
Reg: 07-2005

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Monday, September 12, 2005 - 11:22 pm, by:  Freeman Tang (Cobra_man) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

or adjust the idle speed screw, ...not the ones sitting directly under the throttle or cruise linkages facing downwards, it's the one that is a bit tucked in under the cruise linkage mechanism, facing towards the front of the car. Use 8 mm socket with an extension to loosen the lock nut first, and a 2.5mm allen key to turn the screw clockwise. wind ur idle speed up to 800, and c if there is still a miss.
Alan Chow
Tinkerer
Vic
TT

Posts: 33
Reg: 09-2005

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Tuesday, September 13, 2005 - 09:04 am, by:  Alan Chow (Kfchow) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

tried an ecu reset.. doesn't help at all.. freeman i'm not sure which screw you're talking about. do you have a pic to point it out?
Adam Brown
TryHard
QLD
Soarer TT Manual

Posts: 65
Reg: 07-2005

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Tuesday, September 13, 2005 - 10:43 am, by:  Adam Brown (82ajb) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I wouldn't recommend adjusting the "idle screw". It is actually the butterfly stop, so that the butterfly can't smash into the throttle body. What controls the idle in a tt is actually the ICV (Idle Control Valve, funnily enough) at the back of the intake manifold.
I've had a similar problem. Run a bottle of injector cleaner through the engine, and change the plugs. If that doesn't help, then maybe the O2 sensor as well. Also, remove the ICV and clean with carby cleaner.
P.S. Iridium plugs are hard to tell if they are worn out. I replaced mine with a set of standard plugs, as a process of elimination (a lot cheeper at $3 a plug as opposed to $25ea). If it helps, consider putting new iridiums in. I'm still running standard plugs, they'll just need changing every 10k km's or so.
Emanuel Spinola
Moderator
NSW
JZZ30

Posts: 372
Reg: 07-2005

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Tuesday, September 13, 2005 - 02:09 pm, by:  Emanuel Spinola (Manny) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Screwing around with the throttle plate stopper screw will also throw out your TPS settings! Your EFI ECU won't know when you're idling with your foot off the accelerator or when you've backed off suddenly!!!
Alan Chow
Tinkerer
Vic
TT

Posts: 36
Reg: 09-2005

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Tuesday, September 13, 2005 - 02:30 pm, by:  Alan Chow (Kfchow) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

hrmm i've changed the plugs about 2 months ago so it wouldn't be that. I think it started happening a bit after i did my 100k service. i've run injector cleaner through it and that didn't make a difference. Yeah i think i'll clean the ICV, morgan too reconmended that i do that.
Morgan Cross
TryHard
Victoria
Soarer TT

Posts: 264
Reg: 07-2005

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Tuesday, September 13, 2005 - 04:30 pm, by:  Morgan Cross (Morgan) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Alan, once I get my 440's in I'll give you my 380's ok, they could be farked?
Alan Chow
Tinkerer
Vic
TT

Posts: 37
Reg: 09-2005

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Tuesday, September 13, 2005 - 05:47 pm, by:  Alan Chow (Kfchow) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

yeah thats true.. thanks mate.. you're a champ
Simon Roberts
TryHard
Kent
TT

Posts: 106
Reg: 07-2005

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Wednesday, February 28, 2007 - 08:36 pm, by:  Simon Roberts (Simonr) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Emanuel Spinola wrote on Tuesday, September 13, 2005 - 02:09 pm:

Screwing around with the throttle plate stopper screw will also throw out your TPS settings


So the throttle butterfly is connected to the TPS and the TPS will therefore register greater than 0% if the butterfly is held open by the stopper screw?

Short of shelling out for an ECU that allows IACV control (which the Emanage doesn't) has anyone found a cheap way of raising the idle speed?

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