2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

qustion about air fuel ratio

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Old Aug 16, 2004 | 11:22 PM
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From: Prosser Washington
qustion about air fuel ratio

ok after i removed my emissions i noticed that at idle i am sittind at full rich.. is this normal for after the removal of the air pump and componets?? any help is greatly appreciated
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Old Aug 16, 2004 | 11:24 PM
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From: Coldspring TX
Idle is gonna be rich. If you removed the BAC, even more so...
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Old Aug 16, 2004 | 11:35 PM
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From: Raleigh/Cary, NC - USA
You have a s4 or s5?
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Old Aug 17, 2004 | 12:08 AM
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From: Prosser Washington
it is an s5 witht the bac unhooked
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Old Aug 17, 2004 | 12:10 AM
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forgot to mention i belive i fixed the o2 wire too finally
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Old Aug 17, 2004 | 12:19 AM
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Heh.. you again.

I was going to say if you had an S4 to adjust the idle mixture.... but s5s don't have one.

Hook the BAC valve back up dude... no point really in taking it out, it simply fixes things like this...

The rat's nest, ACV, and the clunky crap on the TB is the stuff you want to remove as far as emissions... the BAC valve solves more than one problem... idle being one of them.

When you removed your emissions.... did you hook up the pressure regulator control? The vac hose that goes from the seconday fuel rail, to the solenoid, to the... well.. i dunno on a TII.. but on N/A.. the VDI/exten manifold.

Good job on the O2 wire btw...

Last edited by poor_red_neck; Aug 17, 2004 at 12:22 AM.
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Old Aug 17, 2004 | 12:22 AM
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From: Prosser Washington
yes the pressure regulator is hooked up again and the bac wire ripped off at the connector i need to find a doner connecto0r
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