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2004 to 2008 F-150 and Mark-LT 4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs. |
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#1
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Well, I guess I'm in the right area for gearing if thats the case with my 4.56's considering I had the 3.73's to begin with stock. I just called a couple places to do my spark plugs (I really don't have the time to deal with broken spark plugs) and these dealerships around me are out of their damn minds. . .One quoted me 360 something plus 115 if they broke one or more plugs, the other was $600!!!(Didn't even ask about broken plugs) ![]() ![]() ![]() I may end up having to find time if I want them done, not sure I can stomach paying that much for a spark plug change. . . I just pored a can of Seafoam into my gas tank to clean up my jets a bit, add that to the list of things I've done to get this truck running as well as it can. |
#2
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Aren't you also a member on F150online? Just ask if you can borrow somebody's tool set. I'd also ask local auto parts stores to see if they'll rent them. I've seen some write-ups where they spent a bunch of time and got them out carefully. Spark plugs are relatively easy...can't say they are easy because I built a bike that just about beats all on ease.
![]() Run techron or chemtool, they contain solvents like toluene and xylene that chemically break down carbon deposits more effectively. Seafoam does not, the only solvent it has is naptha (25-35%). The rest is pale oil for lubrication (40-60%) and 10-20% isopropyl alcohol to draw out water.
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#3
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My best friend works at my local ford dealership. He's got a tech there that may be able to hook me up, so I'm holding off until I hear from him. |
#4
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![]() Gas mileage isn't even worth calculating because it uses so little. It'll be my grocery getter and bank fishing transport this summer. Might also be doing in town commuting after a regear. It has plenty of acceleration just not enough top end speed to keep up with traffic. Ok, then I would definitely hold off until you hear from them.
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#5
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#6
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Spark plug change does make a difference. Go ahead and get the Granatelli COP Connectors upgrade while your at it. ($100)
They work awesome with tune. Make sure you are running 93 and are programmed for it, HUGE difference over 87! I have the lisle 65600 tool needed for the plugs. 4 of mine broke, really not a bad job as long as your rear one does not break. Not sure what my 0-60mph is, only have distances on my time stamps from the tracks. I should be pretty close to the 8.5-9.0 second range with my mods I am guessing... Also 4.56 gears WAY to high unless you tow all of the time. Just a lift and bigger tires, 4.10s. Also seems like your time stamp is pretty important. I know a lift and big tires look good, but if its speed you want, you will have to ditch 'em |
#7
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My speed isn't important to me nor is the off the line speed contrary to what it may seem according to my posts. I'm using the 0-60 time as a baseline to measure the overall performance of my truck and how it compares to like build trucks. I merely want my truck to operate at its maximum capibility and it seems like its not. So I'm simply trying to figure it out. =) |
#8
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Did a test this morning on my way to work and did 8.9 seconds. It was 71 degrees engine was still cool and transmission was only 105 degrees. Do you think the operating temps of my truck could cause a power loss for some reason?
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#9
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On top of the cold test I did this morning, I also did an operating temperature test just before getting in to work, same temp outside, it ran a 9.7 second 0-60. Seems like perhaps I am losing some power once it reaches operating temps. What could cause that if that were the case?
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