[timmypstyle]

Originally Posted by 4.2L_Guy

i have been thinking of putting a K and N intake on it. would this help the bad millage problem also? i know it would but would there really be that much difrence to justify a 300 dollar intake?
and my pickup has the 3.55's so you would think the millage would be outstanding... but it is nothing close to outstanding for a V6
thanks for the responses guys

1st, with the mileage. you have a 98, ford didnt update teh computers untill 2000 at least with the 4.6L. my uncle heard that straight from ford. his 97 4.6L ext cab 4x4 was only getting 12mpg with about 110k miles. they told him they updated the stuff in 2000 so 97-99 had poor gas mileage, so that might be one.
2nd, 3.55 is worst for mileage. if you want better mileage go with a 3.31 or 3.08(both are stock configurations) 3.08 is best for highway. i had an 04 heritage (03 style)reg cab longbed 2wd manual with 3.08 rear end. stock average mpg was consistant 18.9mpg, with K&N drop in filter i got consistant 19.9mpg and with K&N 77 series intake i got 22.5mpg consistantly. i traded my 04 in for an 08 but took off the intake and put it on my 08. i dont know mpg stock but with intake i am getting around 20mph average with reg cab shortbed 2wd 5speed with 3.55 rear. 3.55 is standard on the towing package, 3.08 is for highway. if you want pulling power but better mileage, go with a 3.31 rear. if you dont haul much, go with a 3.08 unless you have extended cab or 4x4, then go with a 3.31. of course you can get whatever you want but those are the stock ratios i know of so they would be easier to find

also forgot to mention. i drive a standard which is a 5speed compared to the auto's 4 speed. either way 3.08 is the best for mileage but my info was for manuals. if you have an auto the tranny's gearing is different thna the manual so my 3.55 rear ended truck i have to shift into 3rd at 50-55mph whereas anauto i have heard shifts to 3rd around 70