I am just wondering why everybody keeps saying stick to OEM stick to OEM...what is a better after market spark plug that everybody has used? I have a 2001 4.6 XLT if you all are wondering...I just want to know some facts about why people keep pushing OEM

 

This is why:

"Look Ma, no electrode" !




And - if yer really unlucky:




Bottom line: OEM Motorcraft plugs are inexpensive, nickel-plated, platinum-tipped, are of the correct heat range, run excellent, and tend not to fall apart in use.

Good enough fer most folks. If ya have the burning need to spend $$$ get Denso iridiums (you'll need the IT-16's fer yer specific truck). They are probably the best there is.


MGD

 

This is why [bought this 02 5.4 from a guy that ran Bosch for less than 2k miles]

 

Torkum, that holes is there for extra intake whenever the engine needs it, trust me, it adds like 400HP.

 

for the iridiums i noticed they are pre gapped at .44 should they be gapped to .54?

 

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

https://www.f150online.com/forums/ch...my-engine.html

https://www.f150online.com/forums/920757-post3.html

Given the above - you may want to leave it alone - they can easily be damaged while regapping if not careful ... but if you do, 0.050" is recommended (see last linky).

MGD

 

Do you have dual exhaust if so what do you have?....or why not to get dual exhaust....i found magnaflow's online that do not require welding and it is a DIY kit but im debating buying it

 

Sir - you are bent on turning this into a multi-purpose thread

No - I do not have duals.

For yer exhaust question(s), may I redirect you to this for starters: https://www.f150online.com/forums/ex...duals-not.html

And, please see the sticky linked in my sig for an excellent tutorial.

IMHO - Duals can affect yer low-end if not sized correctly. Maggie catbacks are fine - be prepared for some drone in the 1800-2200 rpm region (a common experience).

Additionally - Have a look-see in the exhaust section - a few folks there know a crapload more than I do on this topic. Duals are a very popular topic.


MGD

 

ive been running bosch platinum plus plugs for nearly 10K now with no problems whatsoever...

 

Buy a Lottery ticket. Now.

You name it, someone on here is running it.

I'll just let the preponderance of the evidence speak for itself ...

MGD

 

Then you already have something in your head that's broken.

 

Good one Brew!

You all know what I'm running, but I'll not state anything else, since I don't want to get all caught up in a debate that for whatever reason has not happened to me in over 100,000 + miles...

Mitch

 

i ran bosch double platts for 2,000miles had a bad stumble/missfire then ran autolite double platts. for 3,000 miles had a miss. been running motorcraft single platts. not one prob in almost 20,000 miles.

oh and also because my truck tells me to.


"The more parts that say MOTORCRAFT the happyer a triton motor"-ME

 

Yea, but you have stock in the company.