Emissions Failed Inspection CO adjustment fix O2 Sensor 87 4000Q 1987 Test

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Repackaged for Audifans search and Wiki base info.  Subject line 
From: Brendan Walsh <>
Subject: Re: miserable failure....
------------------------------
Brendan Walsh wrote:
> so i went through nj state inspection today, pulled 1.22 on the co
> test (passing is .50, hence the subject line). 

Well, this doesn't answer the question you asked, but it
may help your situation:

http://www.audifans.com/twiki/bin/view/Audi/EmissionsTestTips
Kent McLean
------------------------------

From: Brendan Walsh <>
To: Kent McLean <>
OK, so i checked the duty cycle, was up around 30%, set back to 27% on
te button.
checked the dpr current, 10mA no matter how i adjust the set screw. it
does go up (and down as the engine is revved maybe .60mA on the up
swing, maybe -50mA on the down.I confirmed the the 02 is working,
reads .54-.55V @idle,  <<<SNIP>>>> see below.
On 6/25/05, Kent McLean <> wrote:
> Brendan Walsh wrote:
> > so i went through nj state inspection today, pulled 1.22 on the co
> > test (passing is .50, hence the subject line).
> 
> Well, this doesn't answer the question you asked, but it
> may help your situation:
> 
> http://www.audifans.com/twiki/bin/view/Audi/EmissionsTestTips

From: Huw Powell <>
Subject: Re: miserable failure....(UPDATE)

> checked the dpr current, 10mA no matter how i adjust the set screw. it
> does go up (and down as the engine is revved maybe .60mA on the up
> swing, maybe -50mA on the down.I confirmed the the 02 is working,
> reads .54-.55V @idle,  varies if i rev the engine. The dpr current not
> moving at all at idle wories me, likely that the ecu temp sender is
> bad(the one in the bottom of the neck at the head)? any
> reccomendations to confirm?

Your OXS is not working - its output, and the dpr current, should both 
vary continuously at warm idle.  It may not be bad, if the wiring to it 
has a problem.  The half volt you see at its connector is a reference 
level coming from the ECU.
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