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Old 08-26-2012, 02:47 AM   #1 (permalink)
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A MAF Sensor Mod

http://www.kitesolar.com/car_fuel_mod.htm This mod restores the fuel efficiency by as much as 20% improvement over factory.

What are needed are a set of tin snips and some material suitable for a restrictive plate. I used some copper sheet I had laying around.

The Mass Air Flow sensor mod tricks the O2 sensor as air flow around the MAF element is lessened. The computer recognizes less air so it squirts less fuel. The O2 sensed at the catalytic convertor will achieve a stable level when the flow of air is restricted somewhat... To do this the computer modifies the fuel mixture.



I might see more improvement without sacrificing performance by covering the maf sensor slightly in my 2007 Spectra5.

I think it may do better than the 5 miles per gallon improvement I am seeing in my KIA Spectra5 but it is a sports sedan. Your car may do better or worse. Also don't mess up the MAF sensor because they are supposed to be quite fragile.


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Old 08-26-2012, 02:50 AM   #2 (permalink)
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Neat idea...would love to see what kind of numbers you are getting, both before and after
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Old 08-26-2012, 08:10 AM   #3 (permalink)
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Also let us know when your engine is ruined from running too lean. Seriously, leaning out an engine like this mod is doing has the possibility of totally junking your engine.
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Old 08-26-2012, 08:32 AM   #4 (permalink)
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It will only lean the mixture during open loop, in closed loop it still stoichiometric. Open loop is during cold starting and full throttle, unless you have an error code and a bad sensor..
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Old 08-26-2012, 09:40 AM   #5 (permalink)
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Depending on how it changes the flow around and through the sensor it could indeed change the air fuel ratio.
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Old 08-26-2012, 12:32 PM   #6 (permalink)
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I suspect the leaning out of the mixture will raise the exhaust temperatures significantly.
I would use less throttle in your daily driving and more coasting, you will see a 5 mpg increase, without toasting your motor, like Daox suggested you would.

Not long ago i was thinking on restricting the actual airflow to de-tune the motor to make less horsepower.
What i had to do was tune my driving habits not de-tune the car.
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Old 08-27-2012, 12:25 AM   #7 (permalink)
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I did a conversion on a Corvette engine L98 so it could burn 87 octane. As an unexpected result I arrived at around 34 miles to gallon on my first gallon. That was on a V8 and I do have a photo to prove it as it got that consistently. Stopping at lights and getting through about a half hour drive each way to the store. All I did was install a .30 of an inch gasket in a head rebuild. That lowered the compression so I could avoid the pre-combustion or detonation. Then I increased air flow but understand the corvette is more tunnel like.

I liked the result.

I had some other mods and would like to share some time. I have been kinda busy and it will take a while to test the tank on this 4 cyl.

If the distributor is not set it can really glow the exhaust but I am not doing that this is a cheap easy and fool proof. I think is sounds a little smoother running right now but I know that is a lot to assume at this point from a simple mod.
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Old 08-27-2012, 10:46 PM   #8 (permalink)
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Quote:
Originally Posted by BikerModder View Post
Untitled Document This mod restores the fuel efficiency by as much as 20% improvement over factory.

What are needed are a set of tin snips and some material suitable for a restrictive plate. I used some copper sheet I had laying around.

The Mass Air Flow sensor mod tricks the O2 sensor as air flow around the MAF element is lessened. The computer recognizes less air so it squirts less fuel. The O2 sensed at the catalytic convertor will achieve a stable level when the flow of air is restricted somewhat... To do this the computer modifies the fuel mixture.



I might see more improvement without sacrificing performance by covering the maf sensor slightly.

I think it may do better than the 5 miles per gallon improvement I am seeing in my KIA Spectra5 but it is a sports sedan. Your car may do better or worse. Also don't mess up the MAF sensor because they are supposed to be quite fragile.
this "mod" does nothing at all. it's about as good as the resistors your suppost to put in-line with your sensors. snake oil. Meaning the ecm with change an adjust accordingly.

might effect your throttle response though.

if your getting 5mpg, do you have a scangage or equiv. take a pic of what the maf reading is.
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Old 08-28-2012, 06:34 PM   #9 (permalink)
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i just don't know what you're suggesting? It is a good mod. I already went a hundred miles and I don't live that close to work. I just caught it though there are many different types of vehicle though. Alright
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Old 08-29-2012, 09:53 AM   #10 (permalink)
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I would not recommend this mod. Are you mentoring the AFR? If you are not checking engine parameters and testing there is no way of telling what is happening, good, bad or indifferent. You got a mileage increase was that the reason ( A-B-A testing). What is the long term effect.

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