Soarer Central: Low idle

Soarer Central Mechanical - TT General Mechanical Low idle

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Archive through February 28, 2007	Simon Roberts	25	1
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Cihan Aday
Goo Roo
Plug-in Emanage's - Now Available - Tuned to spec
JZZ30

Posts: 1801
Reg: 07-2005

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Wednesday, February 28, 2007 - 10:32 pm, by: Cihan Aday (Cihan)

How cheap?
Grab a 1 way air (set to intake only) valve and put it at the end of a rubber hose coming off the intake manifold. Then attach a small valve and use to adjust the idle, the valve can be a cheap ebay boost controller for example.

Danny Dinh
TryHard
Victoria
GT T

Posts: 245
Reg: 11-2005

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Wednesday, February 28, 2007 - 11:49 pm, by: Danny Dinh (Xtc)

I notice with extra earth cable it helps bring the idle back to normal. Or clean the spot where your main earth cable is bolted to.

Mine idles at 700rpm and 900rpm with aircon on.

Simon Roberts
TryHard
Kent
TT

Posts: 107
Reg: 07-2005

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Thursday, March 01, 2007 - 04:33 am, by: Simon Roberts (Simonr)

Cihan Aday wrote on Wednesday, February 28, 2007 - 10:32 pm:

You must be watching over my shoulder! I ordered all the bits from DemonTweeks last night - I didn't mention it in case someone had an easier solution! I can't seem to find an appropriate ball valve though.

Braden Murdoch
TryHard
NSW
Cressida 1JZ TT

Posts: 319
Reg: 04-2006

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Friday, March 02, 2007 - 12:37 pm, by: Braden Murdoch (Ribfeast)

630rpm for me according to SAFC. 700RPM if the voltage of the battery gets below around 11 volts.
450-580RPM after an ECU reset until it re-learns.

Simon Roberts
TryHard
Kent
TT

Posts: 108
Reg: 07-2005

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Sunday, March 11, 2007 - 09:36 pm, by: Simon Roberts (Simonr)

Cihan Aday wrote on Wednesday, February 28, 2007 - 10:32 pm:
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 •• idle speed up to 800, and c if there is still a miss.

I tried introducing additional air via a one-way valve but ran into problems. Worked fine at first but then the idle got slower and slower until it was back where it started. I'm guessing that this was due to the ECU telling the Idle Valve to close up to allow for that extra air coming from somewhere. That is just a guess though.

I then tried Freeman's suggestion of moving that screw. This seems to have made a lot of difference. I have a solid idle at about 900rpm in D and the engine hasn't stalled since I made the adjustment. Seems OK so far.