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Location:
Melbourne
Registered:
August 2002
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does your TVIS do this?
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Thu, 27 May 2004 15:10
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i've been driving my friend's ae86 with a 4age tvis engine.
I noticed, when i floored it. it will start rev very quick between 3k to 4.5k and then it slowed down a bit between 4.5-5.5 and continued to rev quick again.
only known problem of the engine is the O2 sensor is hanging in the engine bay, not fitted.
any thought?
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: does your TVIS do this?
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Thu, 27 May 2004 15:16
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total guess, but is TVIS opening late? when can you hear it open?
Cya, Stewart
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Location:
Melbourne
Registered:
August 2002
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Re: does your TVIS do this?
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Thu, 27 May 2004 15:19
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around 4.5 to 5. not 100% sure.
but how would it open late?
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: does your TVIS do this?
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Thu, 27 May 2004 15:29
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LOL, when i get my A series engine book from ebay, i'll let ya know 
was just a thought. if it opens early, it'll lose power low, if it stays closed late, it will feel like less power up higher.. perhaps??
maybe it's actually opening early?
i dunno just trying to help at 1.30am 
Cya, Stewart
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Location:
Melbourne
Registered:
August 2002
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Re: does your TVIS do this?
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Thu, 27 May 2004 15:40
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that sounds about right.
any 1 else?
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Location:
South Australia
Registered:
July 2002
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Re: does your TVIS do this?
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Fri, 28 May 2004 01:51
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I would fit the O2 sensor before I looked at the TVIS...you could check the vacuum hoses that are attached to the TVIS VSV.
If the T-VIS is opening late/early either way it will feel like there is a drop in power somewhere in the rev-range. If you can't tell whether it still has the same power up top, then you will need to get some professional to diagnose it.
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Registered:
December 2002
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Re: does your TVIS do this?
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Fri, 28 May 2004 10:22
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i think it has nothing to do with the 02 sensor..i'm talking efi in general ..usually if you go wot..the ecu will ignore feedback form the o2 sensor ...
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Club Member
Location:
sydney
Registered:
May 2002
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Re: does your TVIS do this?
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Fri, 28 May 2004 11:12
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look for vacume leaks around the TVIS vacume tank, it may be pulling up slowly, could even be a faulty diaphram
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: does your TVIS do this?
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Sat, 29 May 2004 01:10
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TVIS.... such fun 
i would be agreeing with a few people here. What i might do is get a friend in the passenger seat whilst you drive, and watch the output from the ECU to the TVIS VCV as you build RPM.
If the ECU is switching the TVIS correctly, then you are searching for a vacuum (<-- see thats how you spell it IRA11Y:P) leak or something wrong with the mechanical movement of the TVIS "flaps"
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Location:
Melbourne
Registered:
August 2002
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Re: does your TVIS do this?
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Sat, 29 May 2004 14:25
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cool. thanks for the info.
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look for vacume leaks around the TVIS vacume tank
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can any one point me to this? with a pic?
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something wrong with the mechanical movement of the TVIS "flaps"
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what other place i should look at?
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Location:
Melbourne
Registered:
August 2002
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Re: does your TVIS do this?
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Sun, 30 May 2004 10:54
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I supported Toymods
Location:
sydney.au
Registered:
August 2002
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Re: does your TVIS do this?
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Sun, 30 May 2004 11:43
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on a semi-related side note
any downfalls to not running an o2 sensor?
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: does your TVIS do this?
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Sun, 30 May 2004 12:49
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mixture and fuel consumption, or leaning out, during cruise and light throttle.
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I supported Toymods
Location:
sydney.au
Registered:
August 2002
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Re: does your TVIS do this?
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Sun, 30 May 2004 13:25
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ah ok
thx
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Location:
Melbourne
Registered:
August 2002
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Re: does your TVIS do this?
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Sun, 30 May 2004 14:43
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yeh, i think the ecu is running as much as fuel as it can.
i got 70kms out of 10L, i think normally is about 100kms/10L.
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