[s-cars] RE: coil diagnosing

[Robert Myers]

Paulie,

I have had some success with doing a modified 
pull-the-injector-and-look-for-the-miss technique.

You are getting a miss under even fairly low boost.  It starts missing 
above a few pounds of boost.  If you disconnect #1 injector and go for a 
short WOT sprint you will start out with a bad miss which gets even worse 
when some boost is present.  The change is noticeable.  If you don't get a 
worse miss with boost while (say) running with injector #2 disconnected 
then coil #2 is the failing one.


At 02:32 PM 7/14/2005, pkrasusky at ups.com wrote:


>Riff simplified:
>
><<<Date: Thu, 14 Jul 2005 12:55:04 -0500
>From: Raphael Avila <riff944 at gmail.com>
>
>Is the miss constant or only under load??  If constant, I would
>suggestsimply unplugging a lead to the fuel injector to determine
>which cyl was having the issue. Or am I being to simple, which is
>always the case.....
>
>Riff
>
>'95 S6>>>
>
>
>Ah Riff if only it were that easy.  That was the case for my POS failure
>tho so I guess I was lucky once.  My hope was to drive it until it
>failed at idle finally, not yet tho after 8 frickin weeks of course.
>Just went from miss after 18psi to 15 to 10 to 7 to 5.  Then back to 10
>after we removed the pack cover, which was very odd (???), now back to
>5-7 again.  Whoopeee.
>
>Besides, you think NASA Bob woulda missed that fact?  Shame on you Riff
>8-)...
>
>-Paul
>
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Bob
Http://Chips-Ur-S.com