[s-cars] Ignition coil replacement

Mon Mar 9 18:00:15 PDT 2009

I had this exact problem today.  Little hotter than your average March day.....~78dF...car had been idling and temp gauge was at 2nd line..but nothing crazy.  Noticed hesitation pulling onto 4-lane under light throttle that recurred twice or 3 times on the drive home.  Pulled codes tonight and got 2212.. For the throttle pot.  
Not sure if that's an old code so i'll clear them tonight and monitor it tomorrow. 
I should be slapped but I noticed today that i've gone 50K on this set of plugs!   I bought the car in Nov 06 and have never changed them.  Tsk tsk I know.  

Wylie Bean (via blackberry)
90 cq
91 90q20v
92 UrS4
08 Q7 3.6P

-----Original Message-----
From: Theodore Chen <tedebearp at yahoo.com>

Date: Mon, 9 Mar 2009 14:51:08 
To: Robert Myers<bob at chips-ur-s.com>
Cc: s-car-list<s-car-list at audifans.com>
Subject: Re: [s-cars] Ignition coil replacement

true.  i left out one tidbit: after a long steep uphill grade in 1st/2nd gear that caused the coolant temperature to rise (but not into the danger zone), the engine was misfiring badly.

that might not be related to this power dropoff, though.  it might be a knock sensor problem, all right, but not the fault of the knock sensor.  after all, we get only 91 octane out here.  :(

----- Original Message ----
From: Robert Myers <bob at chips-ur-s.com>
To: Theodore Chen <tedebearp at yahoo.com>
Cc: Aaron Ryba <aaronryba at yahoo.com>; s-car-list <s-car-list at audifans.com>
Sent: Monday, March 9, 2009 1:53:28 PM
Subject: Re: [s-cars] Ignition coil replacement

Also possible knock sensor problem, Teddy.  That's how the ECU 
handles a signal from a knock sensor.  It instantly dials back the 
timing advance and power drops briefly.

At 04:44 PM 3/9/2009, Theodore Chen wrote:

>i take it this is the one:
>http://www.efiexpress.com/catalog/product_info.php?products_id=18
>
>at 168k miles, my car doesn't have any obvious misses, but sometimes 
>there is a noticeable, abrupt drop in power under acceleration that 
>goes away a few seconds later.  i suspect an ignition coil or POS is 
>gradually failing.  i haven't gotten around to replacing anything 
>yet, but the LS2 coil conversion seems like the way to go.
>
>
>
>----- Original Message ----
>From: Aaron Ryba <aaronryba at yahoo.com>
>To: s-car-list <s-car-list at audifans.com>
>Sent: Monday, March 9, 2009 1:11:50 PM
>Subject: Re: [s-cars] Ignition coil replacement
>
>Another solution I just used is to replace the whole she-bang with a 
>D585 (?, or D581) coil setup from EFI express for $425. The coils 
>are sourced from a Chevy Yukon/Suburban application. Pretty good 
>fabrication from Marc Swanson. It is sold as a "plug & play" system 
>but you may have to do a bit of modification to mount the coils like 
>I did. Evidently he is working on an improved mount that connects to 
>the strut tower bar.
>
>No more worries about failing POS or coils.
>IIRC you can also make your own setup for maybe $280 (?). The info 
>is in the audiworld archives
>
>Check out the postings on the Audiworld UrS4/6 forum.
>
>Aaron
>--------------------------------------------------------------------
>Message: 3
>Date: Mon, 9 Mar 2009 09:54:16 -0700 (PDT)
>From: Graham Hicks <urs6turbo at yahoo.ca>
>Subject: Re: [s-cars] Ignition coil replacement
>To: "Eyvind E. Spangen" <eyvind.spangen at vwaudi-club.no>,
>    s-car-list at audifans.com
>Message-ID: <296036.13882.qm at web52202.mail.re2.yahoo.com>
>Content-Type: text/plain; charset=us-ascii
>
>No way would I consider running the cover over 1.8T coils no matter 
>if stock or how far from stock the car is.  I have had several 1.8T 
>coil fail without the cover, so I can only imagine how short their 
>life would be with the cover.
>There have been a couple of guys on the AudiWorld forum that have 
>stated that the 1.8T harness and V8 S4 coils (077 905 115 S) make a 
>more reliable setup, but the cover still has to stay off.
>
>
>Graham Hicks
>UrS6Turbo at Yahoo.ca
>
>
>
>
>
>________________________________
>From: Eyvind E. Spangen <eyvind.spangen at vwaudi-club.no>
>To: s-car-list at audifans.com
>Sent: Monday, March 9, 2009 9:03:44 AM
>Subject: [s-cars] Ignition coil replacement
>
>The coil pack in my '94 S4 is going bad. It's missing under boost, but
>during normal driving and moderate acceleration under some boost, it is
>fine. Have tried with different POS'es - no difference, it's one or more
>coils/coil wiring. Plugs and the "tubes" between the coils and plugs are
>new.
>
>
>I have found 5 solutions:
>
>1. New OEM coils. Can be had for $120/piece. Expensive, and I still have the
>dreaded POS'es that can fail. In the end almost as expensive as the 034 set,
>and far less durable. Not an option.
>
>2. 1.8T coil conversion. Less expensive, but I've read that the 1.8T coils
>can't handle the heat under the coil cover very good. Is this really a
>problem running just a chip on an otherwise stock engine?
>
>3. Used coils off Ebay or something. Can work for many years, or they can
>fail again in a few weeks. Impossible to say, and a possible waste of money.
>Can be had pretty cheap, though..
>
>4. 034 HO coil set. Technically the best solution, but the price is IMHO
>horrible.
>
>5. Replace the wires on my old coil pack and keep my fingers crossed that
>the problems are caused by cracked insulation and not the coils.
>
>
>I'm considering trying #5 first, but does anyone have any BTDT on replacing
>the worn wires - is it possible that it might help? I'm thinking that maybe
>a failing wire would have caused a missing cylinder all the time, not only
>under boost..
>
>--
>Regards,
>E. Spangen
>
>
>
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