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07 5.4 lack of power

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Old 07-28-2014, 11:46 PM   #1
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Default 07 5.4 lack of power

Ok so my 07 supercrew 2wd 5.4 runs fine...but i just did a level 20's and 35x12.5's. And cruising around town its fine but when i get in highway every hill shes kickin down a gear or 2. Would a programmer fix this issue or am i stuck with it shifting constantly? Heres a pic if truck


07 5.4 lack of power-forumrunner_20140728_224337.jpg
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Old 07-29-2014, 12:44 AM   #2
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I would focus on a tune-up of plugs, COP boots, fuel filter, clean throttle body and MAF, then look into and Edge Evolution or SCT.

I like your stance, but one question, you only did a level kit on the front and fit 35" tires?
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Old 07-29-2014, 12:51 AM   #3
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Yea rough country 2.5" level in front w 1" blocks in rear w new shocks from rough country also. It rubs a little when in a parking lot but thats bc of my wheel spacing. Ive already done cop boots. Need to do plugs but im scared lol
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Old 07-29-2014, 12:56 AM   #4
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Dont be scared of the plugs, I had the Lisle tool on hand, removed the plugs after the engine warmed up and broke none at 113K. I did run a full bottle of Seafoam through the gas tank for 200 miles before hand to help break up some carbon.
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