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  #1  
Old 01-16-2010, 11:18 AM
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Getting Horrible Gas Mileage

I just recently built a cold air intake for my wj and ever since I put it on I can watch the gas gauge go further and further down laughing in my face at every fill up. For some reason I cannot tell why, it has been like this since my first set up. Now to explain that I've had 2 cai set ups. 1st one I did not like the way I built it, took it off put stock box back on. Now ever since then mialage has been much lower even with the stock air box. Put the new one on and now it's even worse. I got gas yesterday, drove extra easy on the highway and it still looks like someone came in and raped my tank. So I don't know whats up with it. Any input would be awesome.
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Old 01-16-2010, 11:58 AM
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Re: Getting Horrible Gas Mileage

reset your pcm by removing the negative cable. I know on the wk's you just need to press the brake pedal to release the stored energy......probably the same wiht your WJ
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Old 01-16-2010, 11:59 AM
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Re: Getting Horrible Gas Mileage

Thanks for the reply will try that and post results.
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Old 01-16-2010, 12:28 PM
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Re: Getting Horrible Gas Mileage

yeah...itll reset it back to the factory config and then relearn from there.
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Old 01-16-2010, 07:52 PM
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Re: Getting Horrible Gas Mileage

The same exact thing happened when I put in my K&N intake. All you need to do is reset the PCM. Do exactly as Scott said and you'll be fine.
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Old 01-16-2010, 07:56 PM
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Re: Getting Horrible Gas Mileage

I'm getting horrible mileage as well in my WK and I just can't figure out why...

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Old 01-16-2010, 11:25 PM
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Re: Getting Horrible Gas Mileage

Reset the pcm back at 16.8 but still burnt a half tank of gas since yesterday and barley went anywhere
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Old 01-16-2010, 11:46 PM
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Re: Getting Horrible Gas Mileage

maybe your foot has gotten heavier? Seriously....intake, exhaust....the WJ is sounding good when you floor it? Maybe thats the problem?
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Old 01-17-2010, 12:31 AM
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Re: Getting Horrible Gas Mileage

No leaks? Check the Fuel Gauge. It doesn't seem right. Reset your ODO and then fill up next time and see how many miles you have gone.
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Old 01-17-2010, 09:35 AM
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Re: Getting Horrible Gas Mileage

Quote:
Originally Posted by Scottina06 View Post
maybe your foot has gotten heavier? Seriously....intake, exhaust....the WJ is sounding good when you floor it? Maybe thats the problem?
Thought of that it I had been but filled half way up drove conservativly and still 1 day-half tank I fugured it to be a little under 100 miles or so. Im getting an averae of maybe 14. Still a little low if you ask me. I never remember it eating that much. Computer average says 16.8
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Old 01-17-2010, 02:13 PM
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Re: Getting Horrible Gas Mileage

man.....I would take 14 or 16.8 anyday of the week.....LOL
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Old 01-19-2010, 09:45 PM
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Re: Getting Horrible Gas Mileage

lol yeah but I only have a 6 banger. Something is not right though. Dumped almost a half tank of gas in 90 miles.
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