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Paul Gaspar
Tinkerer
queensland
soarer sc300

Posts: 67
Reg: 08-2005

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Wednesday, November 04, 2009 - 08:01 pm, by:  Paul Gaspar (Speed) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Could someone be able to tell me why my uncles soarer looses nearly all power when it warms up ? Its a 1998 3.0 ltr VVTI with 48,000 km and ran perfectly until 3 days ago. Are there any good soarer mechanics in Adelaide ? Thanks
Jol Alexander
TryHard
Vic
UZZ31 V8 (no mods)

Posts: 474
Reg: 07-2009

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Wednesday, November 04, 2009 - 08:06 pm, by:  Jol Alexander (Courage) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Lots of things mate.

Water in plugs
Bad fuel
ECU being stupid
Crap on dizzy

Check the plugs first though.. they are bloody water traps.

Oh .. also try reseting the transmission (plug the fuse)
Matthew Sharpe
Goo Roo
North Island
JZZ31

Posts: 4861
Reg: 10-2005

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Thursday, November 05, 2009 - 10:16 am, by:  Matthew Sharpe (Madmatt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

2JZ-GE isn't as bad a plug water trap as a 1UZ. But yes, electrics are probably the place to start.
Mike Triggs
Goo Roo
Western Australia
3.0GT G-Pack

Posts: 1423
Reg: 07-2005

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Friday, November 06, 2009 - 01:34 am, by:  Mike Triggs (Mikeandimah) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

The late '97 on don't have a distributor.

Can't really help much, Paul. As Matthew says, sounds electrical (fuel pump?).

Out VVTi runs fantastically, but I'm unhappy with the fuel economy. Had the O2 sensors checked out, told OK. Is this a possibility for Paul's uncle's car?
Paul Gaspar
Tinkerer
queensland
soarer sc300

Posts: 68
Reg: 08-2005

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Friday, November 06, 2009 - 11:56 am, by:  Paul Gaspar (Speed) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Thanks guys for your help. I think you might be right mike regarding the O2 sensor so will get that checked out . Because Im on the gold coast dont really know any reliable mechanics in Adelaide so was wondering if anyone has a suggestion ? Never had this problem before and is really unusual. When the car is cold it runs perfectly but after it heats up you have to put the accelarator nearly to the floor to get any response.
Mike Triggs
Goo Roo
Western Australia
3.0GT G-Pack

Posts: 1424
Reg: 07-2005

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Friday, November 06, 2009 - 02:00 pm, by:  Mike Triggs (Mikeandimah) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Paul, any competent mechanic should be able to check out O2 sensors (there are two on VVTi engine). It's just a matter of reading voltages with motor running.

Another possibility is coil packs or plug leads- the former can break down under load, but still allow starting. Again, a competent mechanic can diagnose this. I've had all this checked out, and only think mechanic said was to replace fuel filter, had it done but made no difference to poor economy.

There is definitely something amiss with your uncle's car though!
Paul Gaspar
Tinkerer
queensland
soarer sc300

Posts: 69
Reg: 08-2005

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Saturday, November 07, 2009 - 12:58 pm, by:  Paul Gaspar (Speed) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Thanks Mike , I told my uncle about the O2 sensors and he will get them checked next week.
Paul Gaspar
Tinkerer
queensland
soarer sc300

Posts: 70
Reg: 08-2005

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Monday, November 09, 2009 - 02:20 pm, by:  Paul Gaspar (Speed) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Could such a power loss be caused by putting regular unleaded into the car - especially if its the late model VVTI 3ltr engine ?
Mike Triggs
Goo Roo
Western Australia
3.0GT G-Pack

Posts: 1425
Reg: 07-2005

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Monday, November 09, 2009 - 11:26 pm, by:  Mike Triggs (Mikeandimah) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Paul Gaspar wrote on Monday, November 09, 2009 - 02:20 pm:

Could such a power loss be caused by putting regular unleaded into the car - especially if its the late model VVTI 3ltr engine ?




Unlikely, Paul, with engine management (and twin knock sensors) the only difference should be power (as management retards spark). I've run our car on 95 octane, because it was all I could get locally, and there was no noticeable difference (except perhaps economy- but a recent long run mostly on 98 was no better).
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder

Posts: 5677
Reg: 03-2006

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Tuesday, November 10, 2009 - 12:37 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)

Tried the Fuel Pump ECU bypass trick yet ?

Could also be blocked fuel filter , replace that if not done in the last 12mths or so .

Definately cheap ass 91 octane fuel would hurt performance . Specially as we now have 91octane with 10% ethanol everywhere !!!

I would run the tank low and fill up on some 98 fuel and see how it goes also .
Mike Triggs
Goo Roo
Western Australia
3.0GT G-Pack

Posts: 1426
Reg: 07-2005

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Tuesday, November 10, 2009 - 01:14 pm, by:  Mike Triggs (Mikeandimah) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Daniel, ethanol has no effect on performance if the engine is designed to run on 91 octane. There might be a slight drop in economy, that's all. Any 91 in Soarer will cause a performance loss, one would think. I've never tried it. There's no ethanol in fuel over in WA but I used ethanol in a Lancer in Tas recently, no problems.
Matthew Sharpe
Goo Roo
North Island
JZZ31

Posts: 4884
Reg: 10-2005

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Wednesday, November 11, 2009 - 06:13 am, by:  Matthew Sharpe (Madmatt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Indeed, I often use 98 octane, 10% Ethanol in my car and have never had any issues with it. I have never put 91 in though, lowest I've gone is 95.
Paul Gaspar
Tinkerer
queensland
soarer sc300

Posts: 73
Reg: 08-2005

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Thursday, November 19, 2009 - 05:17 pm, by:  Paul Gaspar (Speed) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Just had the problem fixed . My uncle took the car to lexus adelaide and they diagnosed it as the accelerator sensor . They said it is has happened before even on cars that have travelled less than 5,000km . Cost $700.
Mike Triggs
Goo Roo
Western Australia
3.0GT G-Pack

Posts: 1429
Reg: 07-2005

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Thursday, November 19, 2009 - 05:47 pm, by:  Mike Triggs (Mikeandimah) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Glad to hear the issue is resolved, Paul. New one to me, hope ours doesn't go!
Peter Nitschke
Junk Filterer
South Australia
UZZ30 UZZ31

Posts: 11096
Reg: 11-2004

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Thursday, November 19, 2009 - 06:13 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)

Never heard of an "accelerator sensor".

Anyone know what it is?
James Harris
Goo Roo
QLD
GT Starlet

Posts: 3243
Reg: 07-2005

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Thursday, November 19, 2009 - 06:31 pm, by:  James Harris (Haro) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Probably means the THROTTLE POSITION SENSOR (TPS) .

I know they can be a royal pain in the arse when they die. Probably around $200 for a new part though so i reckon 700 is a bit rough.

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