The service guide for my '98 Ford Club Wagon says that my spark plugs should
>be replaced at 100,000 miles.
>With 75,000 miles on the van now, I've got mysterious stalling problems when
>approaching an intersection; i.e, when decelererating.
>
>I strongly suspect the engine is running lean. The leanness is not
>overwhelming, however. There is some pinging, while on the freeway,
>especially during the warmer times of the day, that was never evident
>before. The timing is OK, according to the OBDII break out.
>
>Nevertheless, it would probably be a good idea to change the spark plugs.
>After all, a few misfires, especially as low idle, might cause an engine to
>stall. So I looked at my service guide, and sure enough, it says I'm early
>if I only have 75K miles. But wait, there is a "severe duty schedule" that
>says the plugs should be changed at 60,000 miles.
>
>This van gets a great deal of work on short-haul trips. I have heard that
>this is hard on the engine lubricant. Would it wear spark plugs
>prematurely? Why? Because they're "cold" much of the time? Does "cold
>combustion" age spark plugs at an accelerated rate?
>
>I would especially appreciate any shared experiences on this matter. >
severe = IE delivery van, police car etc something someone who does not own it bags on everyday the average guy is light duty
hurc ast