quattro digest, Vol 1 #4128 - What the hell did I blow up this time? The answer and now a question

[Larry C Leung]

Jim, List;

Glad you were able to figure things out (although no thanks to me...)

How does one check the coil anyway. I have bogging issues at considerably
less
levels of boost, although it's intermittent (though more often than not).
I have a chipped
(1.8 bar) 10 valve MC2 200Q, and I think I've narrowed things down to
fuel (haven't
checked pressure yet, don't have the means but I don't have audible
knock, the fuel
pump is less than a year old, and the injectors are less than two years
and 15K miles
old.) pressure OR spark. Since I don't have the means to test fuel
pressure on my
own, I was wondering how to test the coil other than the laying of the
plug on the head
and watching the plugs for spark. I do get a spark when I do that, but
somehow I can't
imagine it's a test for when the CC is under 10 - 12 psi of boost.

TIA,

LL - NY


> From: JShadzi at aol.com
> Date: Mon, 28 Oct 2002 23:34:27 EST
> Subject: Re: What the hell did I blow up this time? The answer.
> To: jeg1976 at yahoo.com, quattro at audifans.com, mdg3369 at newtsplace.com
>
> --
> [ Picked text/plain from multipart/alternative ]
> Ahh, good stuff, did you just swap coils?
> Javad
>
> In a message dated 10/28/2002 7:19:31 PM Pacific Standard Time,
> jeg1976 at yahoo.com writes:
>
> > I figured it out,  BAD COIL!!!!!!!  Whew, that was a
> > close one.  I guess the coil just decided it didn't
> > want to put out enough spark for 17 psi anymore, which
> > resulted in a TON of fuel being dumped into the turbo
> > hot side, then BANG!  I really am lucky my exhaust is
> > still on the car.  Hmm, I wonder what the inside of my
> > cat looks like......
> >
> > I also hooked up a second 7mm Aquamist jet for the
> > water injection.  It seems to work great having them
> > both turn on at 15 psi.  No bogging so far.  Now I can
> > advance the timing 5 degree's beyond what is safe for
> > 91 octane gas!  Now back to that damn header project:)
> >
> > Thanks for everyones troubleshooting,