[s-cars] 1993 S4 miss firing

[Jim Dupree]

I have heard of problem with power stages and coils but never experience it
and based on the number of people on the s-car list that sent me replies I
think there is something of a coil failure problem. At 210k miles I have no
complaint about their reliability just the cost to replace. Starts with one
coil or a power stage and then shortly there after another fails. By the
time you replace 5 coils @ $130 each and 2 power stages @ $?? it adds up.
The late 1.8t coils have the power stage built into them an I can buy them
for $25 each.
I will start with the plugs and test the coils and inspect the wiring before
I set off on a spending spree. I'll probably even try to borrow a set of S4
coils from a friend that has a 93 S4.
Thanks
Jim

----- Original Message ----- 
From: "Grant Lenahan" <glenahan at fastmail.fm>
To: "Jim Dupree" <jdupree914 at sbcglobal.net>
Cc: "david jones" <tuftywxm at hotmail.com>; <wmahoney at disk.com>;
<quattro at audifans.com>; <s-car-list at audifans.com>
Sent: Tuesday, March 14, 2006 5:53 PM
Subject: Re: [s-cars] 1993 S4 miss firing


> Why would you convert?
> I have heard of few problems with the S4's coil-packs.
> I'd also check wires and connections befor I replaced a costly coil
> pack.
>
> Grant
>
> On Mar 14, 2006, at 8:10 PM, Jim Dupree wrote:
>
> > With the mechanically injected 911's we could get away
> > with an NGK plug instead of the Bosch DPO plugs but
> > they had a shorter life span.
> > Actually I found the Bosch F5DPOR plugs for $12.20
> > each at www.alleurasianautoparts.com If I find
> > something to bump my order to $75 they'll ship for
> > free.
> > Based on the other replies to my miss I suspect I have
> > a failing coil. I'll probably order the plugs and test
> > the coils while I am replacing the plugs. If the coils
> > are the problem I am likely to convert over to the
> > late 1.8t coil set up, as per Dave Forgie's write up.
> > I have found a lot of his write up in the archives but
> > the link I found does not work. Anyone know a link to
> > all the info in one spot?
> > Thanks
> > Jim Dupree
> > 93 S4 with a studder
> >
> >
> > --- david jones <tuftywxm at hotmail.com> wrote:
> >
> >
> > ---------------------------------
> >
> > You can use NGK PFR6Q plugs I have been using them in
> > the AAN, stock to highly modified for years with no
> > problems. They sell for just a little under $12.00
> >
> >
> > Dave
> >
> >
> >
> >
> > ---------------------------------
> >
> > From:  "Bill Mahoney" <wmahoney at disk.com>
> > To:  <s-car-list at audifans.com>
> > CC:  jdupree914 at sbcglobal.net
> > Subject:  [s-cars] 1993 S4 miss firing
> > Date:  Tue, 14 Mar 2006 14:47:23 -0600
> >> Jim Dupreed:
> >>> Pulled the spark plugs and they look OK, not great
> > but OK. these are the
> >>> bosch Platinum DPO plugs that are very expensive or
> > I would have just
> >>> replaced them, I may yet.
> >>
> >> Jim,
> >> Of all the spark plugs in all the world the Bosch
> > F5DP0R is the only one
> >> that works in the AAN.  Period.
> >> HTH
> >> Bill~dead horse~M
> >>
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> >
> >
> >
> >
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>