First there are two different 4.6s, one is the Romeo which is the engine used in the Crown Vics, grand Marquis, Town Cars, Cougars, T-birds, Mustangs and some trucks. The other one is made in Canada and close to the Romeo engine but it uses the same heads and main bearing caps as the 5.4, in fact it is the same as the 5.4 except stroke and deck height. I have the Canadian 4.6 truck engine in my 01 F-150. It had no power spark knocked so bad folks asked how I got a power stroke in a 150 and with a trailer 2,000 pounds LESS that the truck was rated to pull about 45MPH was maximum speed. Ford said they are all like that and there is nothing we can do about it. Eventually I replaced the fuel injectors so all eight would pass fuel and changed the spark plugs, it runs smooth and pulls strong but a trailer of any size I need to keep the overdrive off and take it easy. Would be a good puller if I could of got the 3.73 or a 3.90 rear end but alas in Ford's wisdom you have to buy the 5.4 to get the steeper gear. Oh yes we didn't have any of these problems with the new Dodge we bought in 07.
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Today's Featured Article - Experimental Tractors Article - by Danny Bowes (Dsl). Tractor technology appears to have nearly hit it's pinnacle of development. If you agreed with the subtitle, you are rather mistaken. Quite, actually. As a matter of fact, some of the technology experimented with over 40 years ago makes today's tractor technology seem absolutely stale by comparison. Experimentation, from the most complex assembly to the most simple and mundane component, is as an integral a part of any farm tractor's development
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