Pulstar Plugs Experiment
Senior Member
Joined: Jul 2007
Posts: 3,291
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From: Beaverton Or.
Maybe it was the number four plug, corroded from coolant? That thing had to be misfiring.
Senior Member
Joined: Jul 1999
Posts: 1,929
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From: Oklahoma City
Just installed them! Took me 3 hours at my base's hobby shop but was able to get it. I did not think the plugs were fragile at all and installed in the truck no problem... Didn't even have to gap them! After i started up my truck.... wow! 
My throttle response was so much better and really enhances the truck's power. As for gas milleage, it will take time to see. I had a smile from ear to ear driving home tho! Would recommend these plugs by far! 
My throttle response was so much better and really enhances the truck's power. As for gas milleage, it will take time to see. I had a smile from ear to ear driving home tho! Would recommend these plugs by far! 
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Senior Member
Joined: Dec 2010
Posts: 214
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From: Minneapolis, MN
Yes they did, you pretty much need a good socket set with lots of extensions and swivel sockets. I would highly recommend replacing the COP boots and use the grease on the boots and plugs too. I don't remember messing with the fuel rail at all... the fuel rail is over the COP boots but you are able to squeeze the COPS by the fuel rail without moving it.
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Joined: Mar 2001
Posts: 3,278
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From: Seabrook,NH
I could have gone longer as well but I had a coil go bad so I figured if I was going to spend the time to replace the coils it only made sense to do the plugs as well.
Technical Article Contributor
Joined: Apr 2009
Posts: 10,697
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From: In the fast lane from LA to Tokyo...
Bluejay - When I called around for shop estimates, a lot of them said that the 4.6 also had that problem but they are probably wrong. The dealership guy probably didn't know what he was talking about either but hey its the only ford dealer in my town. I'm mostly doing this because they drop down in price over time, claim more power and mpg, and love to modify.
I'm trying to find more information on the plugs and i found a guy with a titan used NGK vs Pulstar on a dyno and the pulstar gave him more horsepower. If you want to take a look, click here: http://www.titantalk.com/forums/tita...o-testing.html
I'm trying to find more information on the plugs and i found a guy with a titan used NGK vs Pulstar on a dyno and the pulstar gave him more horsepower. If you want to take a look, click here: http://www.titantalk.com/forums/tita...o-testing.html
Senior Member
Joined: Jun 2007
Posts: 5,522
Likes: 6
From: Utah
I dont think they put the 3v 4.6 in f-150's until after they fixed the plug design in 08. Not positive on that. I know Mustangs got the 3v 4.6 but I'm not sure f-150s did until 08+ when they no longer had the 2 piece plug.
Technical Article Contributor
Joined: Apr 2009
Posts: 10,697
Likes: 14
From: In the fast lane from LA to Tokyo...
In general any Ford vehicle mfg from 04-07 with the 3v head on the 4.6/5.4 will have the broken plug issue...check the cop boots......black is bad and brown is good......
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Senior Member
Joined: Dec 2010
Posts: 214
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From: Minneapolis, MN
I'll be building a turbo setup within the next couple weeks, so ill be replacing the plugs with some Denso Iridium's. I'll post pics of the pulstar plugs when I pull them out, they probably have 25,000 on them.