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2004 - 2008 F150 2004, 2005, 2006, 2007 and 2008 Ford F150's with 5.4 V8, 4.6 V8 or 4.2 V6 engine
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Old 09-23-2005, 12:20 PM
Sliver Doug Sliver Doug is offline
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Smile 2005 FX4 5.4 Spark Plugs..??

I was told If you change your plugs to the spark plug PZT-1-FF4 on your 2005 5.4 V8 It would increase your power And MPG..??Click the image to open in full size. has anyone done this change..?? If so what was the improvement..??Click the image to open in full size. Thanks, DougClick the image to open in full size.
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Old 09-23-2005, 01:41 PM
aquaman aquaman is offline
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I don't see how sparkplugs can increase mpg or power as long as your emissions are still good.

I did hear some rumors from another forum that Ford replaced the standard stock plugs with a different part number (maybe the one you listed) for some reason. Dunno if that was to address rough idling instead...
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Old 09-23-2005, 05:01 PM
Ruckus Ruckus is offline
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There is a fellow on here that has or had some magic spark plugs. He claimed 100 additional horsepower with them. I think he goes by 73Mach1. Good Luck!
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Old 09-23-2005, 09:05 PM
xtrm1stang xtrm1stang is offline
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Ford does have a message for tech's to replace the spark plugs with the new part number due to a misfire issue, but you are not going to be able to take it to a dealership and ask them just to replace them, there has to be a proble first. Most of your newer 2005's have the new plugs in them already.
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Old 09-23-2005, 11:16 PM
73mach1 73mach1 is offline
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yes i have them 112hp plugs made by roush.
the new plugs are the same as the new mustangs they were changed when i had the s/c installed cant remember if he said it was a hoter or colder plug. have u seen what the new style plugs look like?
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Old 09-24-2005, 10:20 AM
silver-gt-vert silver-gt-vert is offline
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Quote:
Originally Posted by Ruckus
There is a fellow on here that has or had some magic spark plugs. He claimed 100 additional horsepower with them. I think he goes by 73Mach1. Good Luck!





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Old 10-02-2005, 02:08 AM
BLariat BLariat is offline
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Well, spit it out man? What is the new part number for the plugs?????
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Old 10-02-2005, 02:08 AM
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