Spark plugs

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Jul 24, 2009 | 04:37 PM

mainman

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Spark plugs

I was wondering when spark plugs should be changed after hom many miles or what. And how much does it usually cost to do so?

Jul 24, 2009 | 04:39 PM

Ryan50hrl

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From: Neenah, Wisconsin

Ahhhh....what year do you have? and what engine....this is quite important

If its a 4.2 or 4.6 your fine to go to 100K

If its a 5.4 you'll wish you'd have changed them out early as they tend to sieze and break....

Jul 24, 2009 | 04:43 PM

mainman

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I have a 2004 5.4 L v8. What do you mean they tend to break

Jul 24, 2009 | 04:57 PM

pkvir

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Quote:

Originally Posted by mainman

I have a 2004 5.4 L v8. What do you mean they tend to break

Oh boy, you may want to "search" for info on this.

Jul 24, 2009 | 05:24 PM

mainman

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You guys wanna tell me about this instead

Jul 24, 2009 | 05:25 PM

ggwash21

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Sure.. https://www.ford-trucks.com/forums/search.php

Jul 24, 2009 | 05:47 PM

Mustang6147

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These new engines have there spark plugs changed when they go bad... If you take it in to a dealer, the computer tells them which ones... If your truck isnt missing, then they are probably fine. Triple platnums clean themselves. Not like the old stuff

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Jul 24, 2009 | 09:23 PM

Ryan50hrl

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From: Neenah, Wisconsin

Quote:

Originally Posted by Mustang6147

Not really accurate if you ask me.....as they wear down they perform worse and give you worse fuel economy and performance...

Jul 24, 2009 | 10:05 PM

#10

Mustang6147

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Quote:

Originally Posted by Ryan50hrl

Not really accurate if you ask me.....as they wear down they perform worse and give you worse fuel economy and performance...

I cannot argue that, infact I would agree... However it is Ford and Chevy and mopar techs that will say it. I know one thing. For the price of a triple platnum plug, they better do something

Jul 25, 2009 | 12:15 PM

#11

Ryan50hrl

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From: Neenah, Wisconsin

I don't know of any reputable techs that would say that.....ford recommends they be changed every 100K miles regardless...its a maintenance item....and the computer will tell you if your getting a miss on a cylinder...but that's far from saying its the plug....it could be a number of things if its missing.....so the computer won't say....spark plug on cylinder 7