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James Zdraveski
Tinkerer
NSW
TT-L

Posts: 12
Reg: 05-2007

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Wednesday, June 15, 2011 - 09:54 pm, by:  James Zdraveski (Jam35z) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Hi All again...

Im having this weird problem, at cruising speed when the car is almost rolling (flat road) the acceleration is jerky, Im not sure if its the gearbox dropping back and forth gears or the acceleration itself.
It also happens on cruise control.

Any ideas why this would be happening?

James
Ross Pesina
TryHard
Vic
Soarer T, Soarer TT, Supra TT,

Posts: 450
Reg: 08-2006

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Wednesday, June 15, 2011 - 10:07 pm, by:  Ross Pesina (Ross79) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

could be a dodgy o2 sensor or a hundred other things. Have run diagnostics?
Aiden Cheese
DieHard
QLD
Soarer jzz30

Posts: 977
Reg: 09-2009

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Friday, June 17, 2011 - 01:19 pm, by:  Aiden Cheese (Chillpen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Transmission:

Lots of people have trouble if they use cheap dex3. Solution is expensive dex3 or toyota type 4. In my experience on my 1991 soarer box, expensive dex3 works fine, but other people have in the past explosively disagreed.

Either way, it takes more than 4L generally, so be prepared for about at least 50 dollars to do that.

Coil Packs:
Check to see if they're cracked

Spark plug:
Make sure they're not black, they could be not sparking if your fuel has been running rich for too long.

You probably want to give more details though, there's a few components to a car you know, and almost all of them contribute to moving the car forward.
James Zdraveski
Tinkerer
NSW
TT-L

Posts: 13
Reg: 05-2007

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Saturday, June 25, 2011 - 11:35 pm, by:  James Zdraveski (Jam35z) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Hi Guys thanks for the input...
OK after another week of driving, its seems to be transmission, its seems to be switching between 4 and 5 gear in the automatic transmission at a no-load cruise.
Does this sound familiar to anyone at all? its really annoying..
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder

Posts: 6369
Reg: 03-2006

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Sunday, June 26, 2011 - 08:08 am, by:  Daniel Clarke (Dieseltrain) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

There is no 5th gear in an auto . 1,2,3,4 and the convertor locks up in overdrive .
Peter Nitschke
Junk Filterer
South Australia
UZZ30 UZZ31

Posts: 12144
Reg: 11-2004

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Thursday, June 30, 2011 - 10:24 pm, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

The change should hardly be noticeable though. Converter lockup tends to happen around 60kph at normal driving, it will turn on/off at slight load variations caused by small undulations in the road. Get away from 60 kph though, and it tends to need throttle activity to switch.
James Zdraveski
Tinkerer
NSW
TT-L

Posts: 14
Reg: 05-2007

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Sunday, July 24, 2011 - 08:45 pm, by:  James Zdraveski (Jam35z) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Thanks Peter, this sound like it! the Converter locks and unlocks back and forth over and over at around 60km/h.

Any fixes for this weird problem?

James
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder

Posts: 6413
Reg: 03-2006

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Sunday, July 24, 2011 - 09:21 pm, by:  Daniel Clarke (Dieseltrain) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Yep, leave Overdrive OFF unless constantly driving over 70km/h . YOu will find fuel economy will improve and smoother driving :-)
James Zdraveski
Tinkerer
NSW
TT-L

Posts: 15
Reg: 05-2007

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Sunday, July 24, 2011 - 09:55 pm, by:  James Zdraveski (Jam35z) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I do allot of driving on freeway too, I really need Overdrive working properly. any real fixes for the switching?
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder

Posts: 6414
Reg: 03-2006

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Monday, July 25, 2011 - 07:22 pm, by:  Daniel Clarke (Dieseltrain) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

It shouldnt be noticable like thumping though, normally a nice smooth transition .

Must be something wrong , like diff lash ? DOes it do this in 2nd gear or 3rd gear ?
Dave Rose
Goo Roo
wa
uzz31 v8

Posts: 1647
Reg: 03-2007

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Monday, July 25, 2011 - 09:20 pm, by:  Dave Rose (Sand_groper) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I would try a full trans flush , but it takes 12 lts

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