spark plugs

[quk@sievers.com (Phil Payne)]

In message <970614012637_-561520782@emout10.mail.aol.com> AudiJeep@aol.com writes:

> I recently pulled one of by plugs on my '92 100S. According to my records,
> they were changed at 45k. They are the stock 3 electrode NKG's. There appears
> to be a whitish corrosion on the plug. My local parts store told me that this
> is caused by the type of gas I use.

No - by the _amount_ of gas you use.  It's a sign that the engine is running 
for most of its operating period on a weak mixture.  IMO the best thing to do, 
if you're not mechanically inclined, is to find a _good_ (personal 
recommendation from someone who _knows_) Bosch fuel injection specialist.

If your usage is predominantly highway cruising at gentle speeds, this is a 
fairly normal state to find the plugs in after 18k miles.

> Are these plugs "fouled" and need replacing?

Not necessarily, but it's borderline.  Brush them stiffly with a brass wire 
brush and check the gaps.

> The car does have 63k on it now.

At 18k, if I were to be investigating problems on your car, I'd change them.

> Also, does anyone have any suggestions on a good replacement plug?

Yeah.  The ones you're using.

--
 Phil Payne
 phil@sievers.com
 Committee Member, UK Audi [ur-]quattro Owners Club