[s-cars] POS testing procedure

[W. Bean]

Dave,
I thought the same, although getting the 4 bolts out that hold the POSs to the bracket has proven to be a total nightmare.  One of the downsides I guess of having a basically unmolested 18 year old car, even one from the South is the gunk that builds up on those screws, not to mention they look to have loctite on the threads, and instead of being able to use a ratchet on them, they have phillips heads.  I've hit them with PB to see if that'll dissolve some of the gunk and make removal any easier.  

Another question I had was the clips that hold the wiring harness to the coils themselves are very brittle and started to crumble when I attempted to remove them.  It looks like a pretty tight fit so I don't know how imperative it is to have those little clips intact, but I didn't risk it.  Collective wisdom on this?



  
---- djdawson2 at aol.com wrote: 
> 
>  Yes, changing positions on the POS is much easier than moving coils around.  If the miss moves, then you know what channel on what POS is shot... then you can use the unused channel to get back in business.
> 
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> -----Original Message-----
> From: W. Bean <theringmeister at triad.rr.com>
> To: s-car-list at audifans.com
> Sent: Thu, Sep 2, 2010 6:55 am
> Subject: [s-cars] POS testing procedure
> 
> 
> I've narrowed the misfire that manifested itself yesterday to cylinder #2 via 
> 
> pulling the injector lead and having no change in poor running. This morning, 
> 
> the issue was not evident on the trip to school with the kids until about 10 
> 
> minutes into the drive, at which time it was a total lack of fire on that 
> 
> cylinder, so I'm guessing it's heat related?  Back home now and need to isolate 
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> to coil or POS channel after I pull the cover to make sure it's not a plug, (the 
> 
> heat issue leads me to believe that's not likely).  Forgive me if this seems 
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> like a ridiculously simple question but I have a PM brain on technical staff and 
> 
> he hasn't shown up yet.  AM brain is not at all a viable alternative, especially 
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> this morning for some reason....maybe he has evacuated in preparation for Earl 
> 
> making landfall tonight.... anyhooo, what's the easiest procedure here? Pull the 
> 
> coil cover and swap two coils to see if the miss moves, or swap the POS plugs?  
> 
> The plug leads from the harness to the POS'
> 
>  s aren't long enough to just swap them from one to the other, so I guess I'd 
> 
> have to remove the POSs from their respective brackets and switch them?
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> Really, I'm not this stupid, but damned if I don't feel like it this morning....
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> Lil help?
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> Thanks...
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>  
> 
> --
> 
> Wylie Bean
> 
> TheRingmeister at triad.rr.com
> 
> 90 cq
> 
> 91 90q20v sport
> 
> 92 UrS4
> 
> 08 Q7 3.6
> 
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> 
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> 
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--
Wylie Bean
TheRingmeister at triad.rr.com
90 cq
91 90q20v sport
92 UrS4
08 Q7 3.6