4.6 vs 5.4
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Junior User
Joined: Jun 2006
Posts: 71
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From: SW MN
4.6 vs 5.4
I know this has been probably asked many times, but I am going to say it anyway because it is important to me.
I have a 2000 with a 4.6 and I am thinking of buying a 2000 with a 5.4. What are the advantages and disadvantages of both engines excluding the obvious: millege and power. Which one seems to have less problems? Which one seems to last longer and etc.?
Thanks for all your comments
I have a 2000 with a 4.6 and I am thinking of buying a 2000 with a 5.4. What are the advantages and disadvantages of both engines excluding the obvious: millege and power. Which one seems to have less problems? Which one seems to last longer and etc.?
Thanks for all your comments
Post Fiend
Joined: Apr 2006
Posts: 12,281
Likes: 1
From: Saskatoon Saskatchewan
Well i maybe wrong but there aint a whole lotta difference in mileage i believe maybe a bit better not sure power this differs some people say it has more some say its the same probably a bit more cause of bigger engine problem wise no idea in my opinon both pretty good truck engines
FTE Legend
Joined: Aug 2004
Posts: 37,887
Likes: 20
From: North Central Rural Sask.
Mileage seems to be abit more in the 4.6. I hear most guys say they get around 15ish with the 5.4 and I get 22 mpg with my 4.6. Power is a factor, the 5.4 simply has more. But I assume you know that. As for reliability, they both seem to be pretty good, I have seen guys with both motors post some pretty impressive total miles on their trucks. As for problems I can only say what my 4.6 liter has had for problems, Not very many. Starter once, alternator once, and other then that, regular oil changes.
Senior User
Joined: Jan 2006
Posts: 289
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From: North Texas
Anybody know what year the 5.4 stopped spitting spark plugs? That's the only issue that comes to mind with the 5.4L. When I bought my 2001 (4.6L), I was told that the 5.4L still had that problem in 2001 year models.
Senior User
Joined: Jan 2004
Posts: 232
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From: Gray's Creek, NC
I wouldnt say the 4.6 gas mileage is enough outweigh the pulling power of the 5.4, I have friends with the 5.4 that get just as good as my 4.6. The best I ever got in my 4.6 was 18mpg, I'm sure a 5.4 can get that.
Freshman User
Joined: Jul 2006
Posts: 31
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From: Littleton, Colorado
The mileage difference between a 4.6 & 5.4 is really a wash. But the power opportunities with the 5.4 are much better. For instance, add a SI/DO Cat Back System with a 3" pipe & and air system and you will achieve significant performance results. I live in Colorado, much of my activities are in the Rocky Mountains and to get to my favorite spots, I must go over passes (I-70 & I-40) which range from 11,000 to 12,000 + feet. The 4.6 just doesn't have the torque under a load, while the 5.4 is really powerful. You can cruise control to the 11,000 ++ Eisenhower Tunnel on I-70 at 65 mph.
Also, I have a 2001 SuperCrew with 44,500 miles and have never had problems with the known spark plug issues. Have had one coil pack go out early this year.
Hope this comment helps you in your decision. Mert
Also, I have a 2001 SuperCrew with 44,500 miles and have never had problems with the known spark plug issues. Have had one coil pack go out early this year.
Hope this comment helps you in your decision. Mert
Moderator
Joined: Dec 2001
Posts: 22,436
Likes: 17
From: Louisville,Ky.
Late 2003 was when the heads got more threads for the plugs.
The plug blow out issue is there but only a small percentage of engines have problems. My 01 5.4L has run 66,000 trouble free miles.
The plug blow out issue is there but only a small percentage of engines have problems. My 01 5.4L has run 66,000 trouble free miles.
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Senior User
Joined: Jan 2006
Posts: 289
Likes: 0
From: North Texas
Originally Posted by LxMan1
Late 2003 was when the heads got more threads for the plugs.
The plug blow out issue is there but only a small percentage of engines have problems. My 01 5.4L has run 66,000 trouble free miles.
The plug blow out issue is there but only a small percentage of engines have problems. My 01 5.4L has run 66,000 trouble free miles.
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FTE Legend
Joined: Aug 2004
Posts: 37,887
Likes: 20
From: North Central Rural Sask.
Originally Posted by ChevmaninaFord
I wouldnt say the 4.6 gas mileage is enough outweigh the pulling power of the 5.4, I have friends with the 5.4 that get just as good as my 4.6. The best I ever got in my 4.6 was 18mpg, I'm sure a 5.4 can get that.
Cargo Master
Joined: Dec 2004
Posts: 2,232
Likes: 3
From: NE Texas
The spark plug issue is manageable. Just follow the spark plug changing description stickied at the top. Clean out the wells with compressed air before removing the plugs and then USE A TORQUE WRENCH set to 13 ft lbs. when replacing them.
