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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #1  
Old 03-23-2011, 07:55 AM
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Default Bad MPG with CAI?

Has anyone experienced worse gas mileage with the addition of a CAI? Im not 100% sure, but it seems like Im going through the gas like crazy, like I can literally watch my nujmbers drop on the meter till empty. Could be me and maybe its that Im not gettin the same amount of fuel I was before with the higher prices, but just curious if I missed something or something should be checked, thanks.
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Old 03-23-2011, 08:15 AM
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Is it possible your driving habits have changed, more foot in the go peddle cause it sounds great? On mine I went with a drop in this time as when I used a CAI on my 06 I seemed to want to hear it and miles dropped.
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Old 03-23-2011, 09:47 AM
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Quote:
Originally Posted by JackDaniel View Post
Has anyone experienced worse gas mileage with the addition of a CAI? Im not 100% sure, but it seems like Im going through the gas like crazy, like I can literally watch my nujmbers drop on the meter till empty. Could be me and maybe its that Im not gettin the same amount of fuel I was before with the higher prices, but just curious if I missed something or something should be checked, thanks.
Did you put a new tune in the computer when you added the CAI? You have to tell it that it is getting more air so the computer can adjust. I suggest you take the CAI off and put the factory stuff back on and compare. It's a cheap start.
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Old 03-23-2011, 10:31 AM
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the new cia u added doesnt make the engine take in more air or change any mixtures or anything it just allows more free flowing cooler air into engine when it demands it (when u stomp on skinny peddle) not possible to make mpg worse when u are driving same as before.not sure if u are in the north but winter gas can have an effect on mpg.
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Old 03-23-2011, 09:39 PM
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Spectre CAI here and my mileage stayed the same and since I live on base I usually stay off the throttle, every now and then I step on it. But yes like Charlieb mentioned if you're up north like I am sort of (Hill AFB, Utah) they formulate the gas for the harsh winters. My MPG dropped like 3-4 just from this past summer
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Old 03-24-2011, 03:11 PM
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Adding a CAI/Exhaust to your vehicle is going to increase the amount of air running through the engine. The ecu is going to take this as it needs to correct for the added air by introducing more fuel. This is why you will see a drop in mpgs. If you get a tuner the tune will make this correction more effective and you may see an increase in MPG's.
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Old 03-24-2011, 03:35 PM
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In addition to the advice offered above, which is all good info, check to make sure all your connections are tight and there are no intake leaks.

Also, how long has the intake been on?
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Old 03-24-2011, 05:53 PM
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Quote:
Originally Posted by RamTex View Post
Adding a CAI/Exhaust to your vehicle is going to increase the amount of air running through the engine. The ecu is going to take this as it needs to correct for the added air by introducing more fuel. This is why you will see a drop in mpgs. If you get a tuner the tune will make this correction more effective and you may see an increase in MPG's.
Thanks ramtex,,,any time you mess with air and fuel on these electronic controlled engines, you need to put a tune on it.
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Old 03-24-2011, 06:15 PM
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i havent noticed an increase or decrease seeing mine was installed during winter.
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Old 03-24-2011, 08:54 PM
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driving habits take a huge role in getting good mpgs also.
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