Re: Factory Spark Plug oddity
Ashton Crusher wrote:
> My Dad has a 2000 V6 bought new. It's always run OK but never quite
> as good as he thought it should. Early on he had it in to the dealer
> and was told "All the V6's are like that."
> Last week it developed a definite miss (40K miles). It was still
> using the original, good for 100K plugs. The diagnosis was " a fouled
> plug". So since they were going to replace a plug anyway he had them
> replace all of the plugs.
> He says its running better now, stronger, smoother, better idle, then
> it did when it was new. Seems odd that the factory plugs were somehow
> "bad" from the get-go.
A couple of thoughts on this.....
It doesn't matter if it's squeaky brake pads, a low performing engine
or poor gas mileage, the standard dealer cliche is "They are all like
that". (As per the shop customer service rep's advice, I've had to say
that a few times also)
Second, NEVER run spark plugs for 100K miles. (Although I did see a
Winstar go 250K miles on an original set once!) Even if they do last
that long, there is a greater chance that they will seize to the head
and you will have real problems.
Third, maybe your performance is better than when it was brand new, but
quite often the performance decrease is so gradual with spark plugs
that you usually do see a difference with new plugs that have replaced
old ones. The same way with shock absorbers. You usually see a big
difference when replaced.
I normally chance the plugs in my vehicles between 30K-40K, and of
course, use platinum plugs.