Flashpaq Superchips F5 doesn't make a difference??? - JeepForum.com
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post #1 of 5 Old 05-13-2021, 12:45 PM Thread Starter
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2004 WJ 
Join Date: May 2018
Location: cheyenne
Posts: 123
Flashpaq Superchips F5 questions???

I've reprogramed my '04 WJ w/4.7HO a dozen or more times and I'm still getting lousy gas mileage in town. Maybe 200-225 miles per tank. I drive with an egg under my foot and rarely put my foot in it. Fun when I do though!! I've tried clearing it to stock before programming, and re-programming without returning it to stock and no difference. I've also drove it stock for a tank or so and no significant difference. Am I doing something wrong? Or should I just sell the damn thing?

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post #2 of 5 Old 05-13-2021, 09:20 PM
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1999 WJ 
Join Date: Aug 2019
Posts: 223
Well, I have an 01' Durango w/4.7 (HO Manifold & Cams) also use the Stupidchips @87 Octane Summer Gas and getting around 275 per Tank in Town, 350 Highway, and 325 Highway/City Combined...Anyways, somfink like that :-)

Thinking of changing out the Fuel Filter and Regulator in hopes to get even more Mileage.
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post #3 of 5 Old 05-13-2021, 10:23 PM
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2004 WJ 
Join Date: Jul 2012
Location: Prince George
Posts: 5,409
I honestly don't keep track of my fuel mileage I probably should lol. I use the 87 tune I get regular 10 cents cheaper at the card lock I use. A few years ago going from prince george bc to MacKenzie id go there 200 km on a Monday use it back and forth to work for a week and Friday I went home 200 kms again all on 1 tank so roughly 430 ish kms? Usually my fuel light was on by the time I went back to the same card lock. I have a heavy foot too.
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post #4 of 5 Old 05-14-2021, 07:06 AM
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Join Date: Feb 2019
Location: Crawlarado
Posts: 753
Lifted or stock? Bigger tires or stock? What PSI your tires at? When's the last time you did a tune up (air filter, plugs, etc) ?
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04 WJ, 4.7HO
3" IRO lift, fastman TB, 32s, lunchbox rear 242HD, 3" exhaust
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post #5 of 5 Old 05-14-2021, 09:02 AM
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1987 YJ Wrangler 
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Location: Albuquerque
Posts: 1,224
From my experience, the mileage setting sucks. It detunes the engine to much for where I live. It did work pretty well in Californina on the highway through the flat country.
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