2005 FX4 5.4 Spark Plugs..?? - Ford Truck Enthusiasts Forums



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2005 FX4 5.4 Spark Plugs..??

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Old 09-23-2005, 01:20 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..?? has anyone done this change..?? If so what was the improvement..?? Thanks, Doug
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Old 09-23-2005, 02:41 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, 06:01 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, 10:05 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 09-24-2005, 12:16 AM
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, 11:20 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, 03:08 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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