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 - Oil Bath Air Filters - by Chris Pratt. Some of us grew up thinking that an air filter was a paper thing that allowed air to pass while trapping dirt particles of a particles of a certain size. What a surprise to open up your first old tractor's air filter case and find a can that appears to be filled with the scrap metal swept from around a machine shop metal lathe. To top that off, you have a cup with oil in it ("why would you want to lubricate your carburetor?"). On closer examination (and some reading in a AC D-14 service manual), I found out that this is a pretty ingenious method of cleaning the air in the tractor's intake tract.
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