Silvia Club of NSW

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PostPosted: Tue Nov 23, 2010 8:56 pm 
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T03 Hybrid
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Joined: Wed Mar 07, 2007 4:30 pm
Posts: 183
Location: Newcastle
Car: S15
hi guys just had a problem with my s15 when i start it, it starts fine and then the revs drop and bounce back up and continues to idol fine. sometimes it stalls before it bounces back up. any ideas would help

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PostPosted: Wed Nov 24, 2010 12:08 am 
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Takumi
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Joined: Fri Feb 01, 2002 11:00 am
Posts: 4779
Location: building!
Car: Silvia
most likely:

vacuum leak

dirty idle control valve

leaky injector(s)

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PostPosted: Wed Nov 24, 2010 12:06 pm 
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T03
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Joined: Sun Nov 28, 2004 3:43 pm
Posts: 103
Car: S15 ADM
I had the exact same problem in my S15, infact your description is identical. The car would basically hunt for idle.

Dumheads suggestions all passed the test and it turned out to be a problem with the O2 sensor.

FYI: My powerFC showed the O2 sensor to be fine, so don't trust it if you have one.. what ever the problem was, it was not detected by the PFC.

Good luck!!


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PostPosted: Wed Nov 24, 2010 4:40 pm 
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T03 Hybrid
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Joined: Wed Mar 07, 2007 4:30 pm
Posts: 183
Location: Newcastle
Car: S15
well another thing it does is the lights flicker periodically when the a/c is on.
i did a battery in the boot install about a year ago, about 6 months before my starter motor died. i got the starter motor replaced and since then its been a bit dicky

o2 sensor is only 20k kms old bought brand new
i'll check for leaks
thanks for the help guys

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PostPosted: Fri Nov 26, 2010 2:18 pm 
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Quad T88
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Location: Sydney
Car: S15
replace fuel filter

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PostPosted: Fri Nov 26, 2010 6:52 pm 
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T03 Hybrid
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Joined: Wed Mar 07, 2007 4:30 pm
Posts: 183
Location: Newcastle
Car: S15
found the problem
a dodgy connection to battery at the wire before the connector the voltage is 14.6 v on the battery side of the connector 12.5v i'll change it over on the weekend

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