[s-cars] //S4cylinder, almost again!

[Vincent Frégeac]

AFAIK, these are F6DTC, the specified sparkplugs for the 7A N/A 20V from the
CQ20V and 90Q20V. I've seen a few posts about F6DTC being reliable in AAN
stock and modified. Now, they probably don't last as long as F5DPOR but they
also cost less than a quarter of the later. I almost forgot the S-bitch
presently run with them as the F5DPOR was B.O. last time I wanted to
diagnose an idle problem, and they've gone through 10 month, 15Kmiles
without any problem.

034 says Bosch has stopped the production but, even today, all the audi
parts suppliers I have checked have them stock.

Now, I'm not sure that an engine which eats F5DPOR for breakfast will do any
better with the F6DTC.




Vincent.

-----Message d'origine-----
De : s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com] De la part de Mike Claire
Envoyé : 17 novembre 2006 18:03
À : audijim at comcast.net
Cc : s-car-list at audifans.com; audi5turbotech at yahoogroups.com
Objet : Re: [s-cars] //S4cylinder, almost again!

BTDT.  Once was enough for me.  I called 034 and bought some of these:

https://www.034motorsport.com/product_info.php?cPath=26&products_id=184

They're cheap and so far (5K miles) they run great.  I'd rather change them
more often and not worry about the electrode.

chipped '93 S4, no engine mods.



Mike


On 11/17/06, audijim at comcast.net <audijim at comcast.net> wrote:
>
> I almost turned my name back to "Angry Jim" today. On the way home, as
> soon as I started to slow down and down shift for the toll booth heading
> west on the Atlantic City Expressway, I lost a cylinder and it sounded
like
> I had a lifter collapse. So I babied it to the rest stop and checked it
out.
> It wasn't a fuel injector and I always keep spare POS's in the glove box.
I
> swapped them out and it made no joy. So I jumped in the car and drove it
> slow. I made it home and immediately pulled the coil pack cover and
started
> pulling plugs. Of course you find the culprit in the last thing you do. I
> started at #5 and made it all the way to #2 with the plugs looking
perfect.
> #1 was missing the entire center electrode and the body was very loose
from
> the rest of the plug. I fished around the top of the piston for any
magnetic
> bits and installed another plug. Now this is the exact same thing that
> happened to the previous owner of my S4 when it was the complete Lehmann
> engine. Except that time it
> was #4 cylinder. Is there another alternative to the Bosch F5DPOR plug? I
> think these plugs work great, but at the price for these things, who needs
> to replace them every few thousand miles? These plugs were brand new and I
> have about 5000 miles on this engine build. I dodged a bullet this time.
The
> center electrode disintegrated and after I installed the new plug, a test
> drive confirmed that everything was back to normal.
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