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Old 05-27-2008, 09:16 PM   #1
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How to trick the EFI on newer cars...

What's the easiest way?

What about these devices that HHO Gen companies sell?
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Old 05-28-2008, 11:10 PM   #2
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Don't Buy It...Make It!

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Originally Posted by Nightwish View Post
What's the easiest way?

What about these devices that HHO Gen companies sell?
Go here first and check this site out http://www.smacksboosters.110mb.com/

Check all the links, he shows you how to do it and how to make it. Vids on YouTube also. He also frequents yahoo groups under the watercar and hydroxy heading.

The best way to trick the ECU is to tap into the barometric (sometimes called the atmospheric sensor) sensor with a potentiometer resistor. This sensor is what sends the signal to the ecu to lean out the gas ratio at higher altitude. The higher the altitude the car thicks its at the leaner the mix.

Ron
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Old 05-29-2008, 11:28 AM   #3
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I have an efie on my 2004 dodge, and also a map signal modifier, used to pull fuel when using larger injectors. I went back to factory sized injectors and just as an experiment i tried pulling out a small percentage across the board. it made no difference. The later obd-2 cars are very tough to fool. I played with voltage with pretty much everything that has a wire on it in the car but nothing came of it--(a few CELs). I CAN change my afr's with all the aftermarket racing software that's come along but i intend to sell the car very soon, so I am done upgrading. I cant wait to rip those toys off the dodge and get them into the aspire where i am confident Ill have something in my favor occur.
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Old 05-29-2008, 11:58 AM   #4
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Well the issue is with only trying to fool one at once, it doesn't measure up to what the rest of the sensors are telling it, so it ignores it and goes by default values. Fooling several sensors together will have more effect.

It's like being blindfolded and walked into a meatlocker and being told you're in warm sunny garden, you ain't gonna buy it.... if they stuck an IR lamp in there and had some recorded birdsong playing... you might.
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Old 05-30-2008, 04:44 AM   #5
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You might succeed if you could alter the signal from the primary 02 sensor. Thats the last component in the fuel feedback systems.

Downside is it could hurt your cat and the secondary sensor might read the change as a problem and create a fault code and a CEL.

regards
gary
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