Hey everyone Like too know if anyone has used E3 Spark Plugs in there 5.4 if not what do you think is the best one for it. I just bought a 1999 F150 Lariat super cab Flareside and thought I would start out fresh and do all the maintenance in the next few weeks.


Thanks
Scott

 

Hi & Welcome!

Either stick with Motorcraft, or the top-shelf Denso Iridium IT-16.

Avoid E3's, Autolights, Bosch and Champions for yer engine.

Use new boots and fresh dielectric grease.

Torque to 28 ft-lbs dry if using a nickel-plated plug like the first two.

You can elect to use some nickel anti-sieze on the threads (not necessary but some folks still choose to do so). If you do, adjust torque values as per this guide:

http://www.densoiridium.com/installationguide.php

More info:

www.blownoutsparkplug.com

Refer to FAQ'a # 51 and 52

good luck

MGD

 

thanks MGD

 

just asking would Motorcraft Platinum Spark Plugs SP432 on my 5.4?

 

Hi.

I *think* that's for the 4.6

EDIT - confirmed - that is a 4.6L plug


You want the SP479 ...

From Rockauto.com:

SP479

MOTORCRAFT SUPPRESSOR SPARK PLUG, PLATINUM IRIDIUM, SOLD INDIVIDUALLY -- 0.054 in. gap size, standard service plug; Delivers maximum voltage to the spark plug while maximizing performance and increases engine life; Resists corrosion and abrasion; Reduces the chance of misfire.

* Series: Suppressor
* Quantity Sold: Sold individually
* Plug Type: Resistor
* Electrode Core Material: Copper
* Electrode Tip Material: Platinum

* Product Fit: Direct fit
* Warranty: Motorcraft's 12-month or 12,000-miles warranty

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Fits the following 1999 Ford F-150 submodels:

* 1999: XLT; 8 Cyl 5.4L; "BI-FUEL"
* 1999: XLT; 8 Cyl 5.4L; "GAS"

good luck!



MGD

 

Thank you a lot

Scott