cbr600rx7

I would assume just to change them now. 75,000 miles I feel is very reasonable for plug life. Plus if they are starting to go it may increase wear and tear on the motor so it's good insurance. Now I just need to figure out what freaking plug to order. I would prefer getting the correct plug gap to start with.

WXman

Like I said, mine had the 519s in it so I went to the local Advance Auto Parts and picked up 8 new 519s just like them. Was about $48 total. Took no time at all to replace them...the 5.0 is a dream compared to the 5.4.

I did check the gap and all of my new plugs were gapped perfectly right out of the box.

tareed94

I think any engine is a dream after the 5.4's. What a nightmare if you didn't have the extractor tool. I ended up buying the tool because I broke one off.

cbr600rx7

Try a LS1 F-body rear passenger side if you think that's bad. Or a LT1 4th gen with headers lol. The problem I am having is non of the stores including Ford seem to have the correct motorcraft plugs in stock??? Seems kind of strange.

tareed94

Have you tried a 3V 5.4 with 2 piece plugs? Lol. The one I broke on that one was the passenger rear... After removing the PCM and such I still had to use a swivel or two. Lol

cbr600rx7

So I went into ford and they are only showing the SP-548 for the 5.0 F150. That's CYFS-12-F1 and it's only a platinum plug vs the iridium plug that was in it? What the heck is going on?

cbr600rx7

From what ford is saying is the SP-548 platinum plug supersedes the SP-519 iriedem plug.

roadPilot

Opinion on this plug? And why does it say .50 for the 2011 F150 5.0 if everyone says .41 to .47 (I think)?

lutter5-0

These are the ones I will be installing tmrw.

roadPilot

What gap are you going with?