NEW ECU TO FIX IDLE PROBLEM

[obsessionz]

Finally! Toyota are fitting me a new ecu after 7 months of complaining hopefully this will fix my idle problem ... its from a different batch its not from the south africa batch ... straight from japan, should be getting fitted tommorrow..

[CAP]

My car's Japan Built

I certainly hope this fixes your problem, but I doubt it - why would my car have the problem also?

I asked about it again they said in my case it's possibly due to Carbon Build up and the low amout of km's I do.

Just needs to be flogged to clean everything out :D

[obsessionz]

mines only has 10,000kms on it ...

[CAP]

I've only covered 25,700 since Feb 2003.

My car mostly only gets driven on weekends, otherwise it mostly sits in the garage during the week.

[DANZZT231]

I've only covered 25,700 since Feb 2003. 

My car mostly only gets driven on weekends, otherwise it mostly sits in the garage during the week.

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I think you need to bring it to the drag strip to give it some exercise carlo.

[coladuna]

Finally! Toyota are fitting me a new ecu after 7 months of complaining hopefully this will fix my idle problem ... its from a different batch its not from the south africa batch ... straight from japan, should be getting fitted tommorrow..

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Could you elaborate on what idle problem you are talking about exactly?

Are you talking about the noise that disappears if you depress the clutch but comes back if you have the gear in neutral with clutch out?

If so, where are you located and which dealer are you getting it done from?

[CAP]

Or a few mountain runs :D

[CAP]

The problem being referred to is idle fluctuating or "hunting" between say 350 and 900 rpm on random occassions with some 1zz's.

[DANZZT231]

That's the spirit carlo. Twisties.

[E-Gene]

Yup, I've got the idle problem as well, but it only happened once so I stopped and re-started my car (like any good Windows user would) and it was fine.

[BigBum]

good stuff... lets hope the ecu replacement will fix the problem. :)

[CAP]

That's the spirit carlo. Twisties.

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:D Why else would I spend more money on suspension improvements than engine performance ;)

[DANZZT231]

ahahaha good call.

[Romp]

take it for a long drive interstate :)

[E-Gene]

Time to take it on the Black Spur once the weather gets better.

[CAP]

Time to take it on the Black Spur once the weather gets better.

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Already have - why wait ! :P

[Azza]

Yup, I've got the idle problem as well, but it only happened once so I stopped and re-started my car (like any good Windows user would) and it was fine.

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I only experienced hunting once so far, and it was after I accidentally stalled. I gave the devil a good stab and all gaaaawwwwwnnnn...

[QUICKSILVER]

The problem being referred to is idle fluctuating or "hunting" between say 350 and 900 rpm on random occassions with some 1zz's.

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Does this only happen when the aircon is on?

The following comment is specific to the 2ZZGE, but will apply the 1ZZ as well, imho.

The ECU has an integrated idle up function. Via sensors, this function is activated and sends and receives signals from the idle control valve. Now, your idle control valve also controls your idle speed during warm up cycles after a cold start.

The aircon compressor fitted to the RunX RSi is a very small unit, which saps a small amount of horsepower, when activated. But saying that, it runs a hefty 12 bar worth of pressure. When the compressor activates, it will put some strain on the engine and rpm would decrease, at idle, from +- 800 rpm to around 500 rpm. The idle up function will communicate with the control valve to up rpm, typically to around 1200 rpm. However, in extreme conditions, like a hot day in traffic where you’re pottering around at walking speed, the activation and deactivation of the compressor, together with the activities of the control valve can result in the symptom described. This is mainly attributable to the fact that there are a variety of factors that could all be applicable at that point in time. Consider that the activation and deactivation of the aircon compressor is dependent on the gas temperature, the gas pressure as well as evaporation radiator activities. This will result in continuous activation and deactivation of the compressor as well as continuous activity from the idle up function to try and compensate for this. The result is “idle hunting”.

That’s the long of it. The short of it….its normal and there is no need to be concerned.

Here is the link with some background to the South African owner's concerns.

http://www.tolken.co.za/twincamforum/viewt...?t=5320&start=0

Hope this helps

[obsessionz]

IDLE PROBLEM IS FIXED :D I JUST GOT the apexi N1 Exhaust fitted today tooo omg i love the sounds .... its raws ....

:P

[Otaku]

I don't understand, I have the same issue, but my car is COO Japan.

Is your new Japan ECU any different to mine Obsessionz?

[obsessionz]

no idea dude .... my idle problem was different to urs i think... my idle was dropping Iradically from 750 straight down to 300rpms ... and shaking like crazy ... so its all fixed...

I think my ecu was faulty ...

[CAP]

The problem being referred to is idle fluctuating or "hunting" between say 350 and 900 rpm on random occassions with some 1zz's.

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Does this only happen when the aircon is on?

No, actually never happened to me with aircon on, not really a concern just an occassional anoyance, makes others at the lights sometimes think I'm running radical cam profiles