4.6L vs. 5.4L
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From: Pearl Harbor
2006 Screw FX4, 3.73, 5.4 here...I get the same mileage you get
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From: Houston
Thats pretty good, I do have 20's and 33"s that dont help but still..
I would have got the 5.4 but they were discounting the 4.6 so much more to help move them that I ended up saving near 2 grand. If I put that 2k into the motor I could walk in the 5.4's all day so it was an easy decision for me.
Truth is though after an intake and hopefully a tuner soon the 4.6 isnt a bad motor
I would have got the 5.4 but they were discounting the 4.6 so much more to help move them that I ended up saving near 2 grand. If I put that 2k into the motor I could walk in the 5.4's all day so it was an easy decision for me.
Truth is though after an intake and hopefully a tuner soon the 4.6 isnt a bad motor
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From: Marrero,Louisiana
5.4 breaks alot more often than the 4.6.i have worked (past tense)at a dealership from 2003 till this year and watched these 5.4 3v hit the streets and slowly come back to the shop.the trucks with the 4.6 didnt come back too often if at all.my truck has 4.6 and it will pull anything i need it to and my mileage isnt horrible.its a damn truck who cares about mileage.i bought my 4.6 for durability.and its fine.this is a biased question though because all the guys with 5.4 says buy 5.4 just like all the 4x4 guys tell you buy a 4x4 and dont lift a 2wd.
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From: Pearl Harbor
assassinator is right. if you can wait for the 09 models, the 4.6 3v is coming. the 4.6 2v is inadequate, but I think we'll see the 4.6 3v become the favored motor soon. unless Ford bumps the 5.4 to 350+ hp instead of the estimated 320 hp that's being thrown about
could you explain that one? other than the spark plug sticking, these motors appear to be trouble free in the 06+ and the 04/05's are trouble free once the TSB's are performed
try towing a real load (what your truck is rated for) and then come back saying that. of course it's biased. the 5.4 is the better motor.
same as getting 4x4. might as well get it 4x4 even if you don't need it. modern 4x4 systems don't make you lose MPG like the older 4x4 systems. I guarantee you that my FX4 gets the same/better MPG as most 4x2's. i just carry around about 500 lbs more than a 4x2.
could you explain that one? other than the spark plug sticking, these motors appear to be trouble free in the 06+ and the 04/05's are trouble free once the TSB's are performed
same as getting 4x4. might as well get it 4x4 even if you don't need it. modern 4x4 systems don't make you lose MPG like the older 4x4 systems. I guarantee you that my FX4 gets the same/better MPG as most 4x2's. i just carry around about 500 lbs more than a 4x2.
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From: Las Vegas, NV
5.4 breaks alot more often than the 4.6.i have worked (past tense)at a dealership from 2003 till this year and watched these 5.4 3v hit the streets and slowly come back to the shop.the trucks with the 4.6 didnt come back too often if at all.my truck has 4.6 and it will pull anything i need it to and my mileage isnt horrible.its a damn truck who cares about mileage.i bought my 4.6 for durability.and its fine.this is a biased question though because all the guys with 5.4 says buy 5.4 just like all the 4x4 guys tell you buy a 4x4 and dont lift a 2wd.
I am willing to bet it's at least 4 5.4s sold for every 1 4.6 just guessing...
so naturally your going to see more 5.4s coming in making the illusion they "break more"
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From: God bless America
Th 4.6 is a great engine and I love it in my truck. I do some light pulling of a small camper, 4-wheeler and a small tractor and it's fine. I have all the power I could ever need out of this engine. Do yourself a favor and read about all of the problems the 5.4 has had and then decide on which engine you want. I would not touch the 5.4 with a 10 foot pole.
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From: Pearl Harbor
Th 4.6 is a great engine and I love it in my truck.
it is a good motor...for a car and light SUV. great is pushing it, especially in a 5,000 lb + truck. The 4.6 2v is inadequate for the weight of the F-150. I concede that the 4.6 3v is alot better (something about the extra 40 hp)
I have all the power I could ever need out of this engine.
you are one of the few then. I've driven the 4.6 2wd version of my truck. it couldn't power itself out of a wet tissue until revs were 3k+. the engine was constantly in the higher revs for just everyday driving. that 4.6 feared the highway and hills/mountains
Do yourself a favor and read about all of the problems the 5.4 has had and then decide on which engine you want.
please elucidate.
rather bold statement. I won't say the same about the 4.6....the 4.2 yes. I've had a few 4.6's, and they were okay motors. But not that good.
it is a good motor...for a car and light SUV. great is pushing it, especially in a 5,000 lb + truck. The 4.6 2v is inadequate for the weight of the F-150. I concede that the 4.6 3v is alot better (something about the extra 40 hp)
I have all the power I could ever need out of this engine.
you are one of the few then. I've driven the 4.6 2wd version of my truck. it couldn't power itself out of a wet tissue until revs were 3k+. the engine was constantly in the higher revs for just everyday driving. that 4.6 feared the highway and hills/mountains
Do yourself a favor and read about all of the problems the 5.4 has had and then decide on which engine you want.
please elucidate.
The 04/05's had the diesel sound
the 05's had the injector issues
as far as I can tell, the 06+ is trouble free. once the TSB's are performed, the 5.4 is a great motor. Hungry for gas, but that is any V-8
the spark plug sticking is kinda big, but honestly, it'll take over 8 yrs to get to the 100k mark (12k/yr driving...typical driver). and if you look at production #'s, the PROBLEM is really insignificant. Sorry for the guys it has happened to, but it truly is a small % of people.
I would not touch the 5.4 with a 10 foot polethe 05's had the injector issues
as far as I can tell, the 06+ is trouble free. once the TSB's are performed, the 5.4 is a great motor. Hungry for gas, but that is any V-8
the spark plug sticking is kinda big, but honestly, it'll take over 8 yrs to get to the 100k mark (12k/yr driving...typical driver). and if you look at production #'s, the PROBLEM is really insignificant. Sorry for the guys it has happened to, but it truly is a small % of people.
rather bold statement. I won't say the same about the 4.6....the 4.2 yes. I've had a few 4.6's, and they were okay motors. But not that good.
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From: Rhode Island
Th 4.6 is a great engine and I love it in my truck. I do some light pulling of a small camper, 4-wheeler and a small tractor and it's fine. I have all the power I could ever need out of this engine. Do yourself a favor and read about all of the problems the 5.4 has had and then decide on which engine you want. I would not touch the 5.4 with a 10 foot pole.
Well, its really odd that someone would get a 4.6. Being its underpowered in the heavy 04-08 F150 they really dont get a MPG increase as your right foot has to dig for power. However if you want to tow or actually use your truck to its potental, a 5.4 is the only way to go.
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From: God bless America
It boils down to the fact that the folks who have the 4.6 are very very happy with them. Thew folks with the 5.4 are happy with their's too but just experience for problems then us 4.6 guys. 
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Joined: Feb 2008
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From: God bless America
Well, its really odd that someone would get a 4.6. Being its underpowered in the heavy 04-08 F150 they really dont get a MPG increase as your right foot has to dig for power. However if you want to tow or actually use your truck to its potental, a 5.4 is the only way to go.
Oh, and my 4.6 is in no way under poweered. I have every bit of power zI could ever need and this is even a 4x4 scab running 33x12.50 mud tures.