Just changed spark plugs.... issues

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10-22-2013, 09:31 PM

#11

NASSTY

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I'd either re-gap the stockers to .030 or replace them with Motorcraft SP-534's which are supposed to be gapped at .030.

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10-22-2013, 09:32 PM

#12

Franchi Motorsports

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I just pulled and regapped my stockers. Didn't have any idle issues but my oem gaps were all over the place, up to .41 on some. Took em all down to .31

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10-22-2013, 09:42 PM

#13

gDMJoe

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Quote:

Fast Filly - the stock plugs are iridium? I find this very hard to believe

Believe it. OEM, stock is Motorcraft SP-528 / FoMoCo CYFS-12Y-3 - Iridium

And ... You do know that the NGKs are copper, right?
.

Last edited by gDMJoe; 10-22-2013 at 09:49 PM.

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10-22-2013, 09:45 PM

#14

Youngone2012

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Ya, iridium for sure ^^^

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10-22-2013, 09:48 PM

#15

Fast Filly

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guesss its back to stock I go thanks guys

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10-22-2013, 09:53 PM

#16

Koolponycar

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Quote:

Originally Posted by gDMJoe

And you're not concerned and alright with the difference in the lengths of the - insulator, case, threads as well as the difference in the seats?????
.

I noticed that too. At first i thought it was the way he was holding them, but there is a difference

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10-22-2013, 10:15 PM

#17

Truck owner

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Quote:

Originally Posted by Fast Filly

the stock plugs are iridium? I find this very hard to believe

The stock plugs are Iridium. I had dealer change out all my plugs and regap and put new ones in. I would just go by new stock plugs and check gap and put them back in.

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10-22-2013, 10:49 PM

#18

scap99

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Quote:

Originally Posted by gDMJoe

And you're not concerned and alright with the difference in the lengths of the - insulator, case, threads as well as the difference in the seats?????
.

Saw that too, and thought my eyes were deceiving me...

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10-22-2013, 11:38 PM

#19

Al Kohalic

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The stock OEM plugs are Iridium plugs made by NGK. I called NGK because I was going to go with them on new plugs and I wanted to see what they recommended. They said the OE spark plugs in the Ecoboost are Iridium and are made by them under their Iridium OE line. However they are not the NGK IX line that also has an iridium electrode.

Last edited by Al Kohalic; 10-23-2013 at 10:33 AM.