[s-cars] 1.8T coil odd behavior

[Mark Strangways]

I doubt it is an issue with the oxy sensor, as stated earlier, it does not 
have impact on the engine during warm up.
You could check the voltage to the coils during this "off" period to see if 
the heater may be pulling the voltage down, though I doubt it.

If you had a data logging voltmeter / scope you could see what changes on 
the power & signal lines to the coil paks.
Failing that you may need a automotive ignition scope to check the waveform 
of the spark during this warm up period.

Does leaving the ignition on with out the engine running, as sorta a coil 
warm up period, have any impact.
Also try disabling the fuel pump and crank for 30 seconds or so (10 or so at 
a time) to warm the coils up.
This may not single out the coil paks entirely but may help to see if a 
"warm up" helps.

Mark
----- Original Message ----- 
From: <djdawson2 at aol.com>
To: <vfugman at globaldialog.com>; <s-car-list at audifans.com>
Sent: Thursday, June 01, 2006 10:14 AM
Subject: Re: [s-cars] 1.8T coil odd behavior


> That's an interesting theory as well.  The odd part, however, is the lack 
> of the engine's ability to respond to pedal input during this short time 
> doesn't "act" like an ignition issue.  There is no miss or stumble, just a 
> refusal to rev.  It is still smooth.
>
> Dave
>
> -----Original Message-----
> From: Varon H. Fugman <vfugman at globaldialog.com>
> To: s-car-list at audifans.com; djdawson2 at aol.com
> Sent: Thu, 1 Jun 2006 01:31:49 -0500
> Subject: RE: [s-cars] 1.8T coil odd behavior
>
>
> How long does the heater in the O2 sensor operate after startup?  Does the
> ECU control this?
>
> If there is some common wiring between the +12V to the coilpacks and the 
> O2
> sensor heater, is it possible the coilpacks are seeing a voltage drop 
> while
> the O2 sensor heat is on?
>
> Varon
> '95 urS6
>
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