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Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

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Old 11-04-2007, 05:42 PM   #1
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From Georgia, Glad to be here

Happy to find this group that believes the same thing as me, that our
vehicles should be more efficient.
As for me, I'm just an over-the-hill guy, who always checks mileage at
every fill-up. I am now working to make my 96 Dakota (2.5) better on gas.
22-23 is all it gets, on trips under 10 miles. I've installed a variable resistor
on the MAP circuit(between the sensor and ECM), an EGT gauge, and a
Scan-Gauge. The resistor did not change the mileage at all, but made the
"check engine" light come on. I am considering connecting the resistor
between the oxygen sensor and ECM. Can anyone tell me if this can lean
the mixture without turning on the CE light? Any help will be appreciated.

Berry
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Old 11-04-2007, 06:36 PM   #2
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Hi Berry - welcome to the site.

I generally avoid messing with the A/F mixture since running lean increases production of smog forming emissions. I know others here have done it. Just my 2 cents.

What type of driving do you typically do with your truck? Having the SG is a great start.
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Old 11-04-2007, 06:39 PM   #3
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Welcome aboard, Berry.

That's some decent mileage from your truck. There are a couple other members on here with Dakotas and are getting some great mileage as well. One member in particular (kitcar is the username, stinkerbutt is his truck) has many how-to's and videos on mods to try out.

Others will chime in on the sensor mods as well.

Be sure to fill out a garage section for your truck as well.

Once again, welcome to the site, the more, the merrier!
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Old 11-04-2007, 11:59 PM   #4
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Berry -

Quote:
Originally Posted by Berry View Post
Happy to find this group that believes the same thing as me, that our
vehicles should be more efficient.
As for me, I'm just an over-the-hill guy, who always checks mileage at
every fill-up. I am now working to make my 96 Dakota (2.5) better on gas.
22-23 is all it gets, on trips under 10 miles. I've installed a variable resistor
on the MAP circuit(between the sensor and ECM), an EGT gauge, and a
Scan-Gauge. The resistor did not change the mileage at all, but made the
"check engine" light come on. I am considering connecting the resistor
between the oxygen sensor and ECM. Can anyone tell me if this can lean
the mixture without turning on the CE light? Any help will be appreciated.

Berry
Welcome to GS!

TomO's recommendation of stinkerbutt is a good start.

The MAP resistor probably didn't help because the ECM will be in closed loop once the 02 sensor is warmed up. In closed loop, other sensors are ignored. Here are threads you may want to read regarding 02 sensor modification :

DIY EFIE for less than $5.
http://www.gassavers.org/showthread.php?t=5372

Just ordered an EFIE - BrightGreen FeverBuster
http://www.gassavers.org/showthread.php?t=4894

Eagle Research EFIE Online ... (me)
http://www.gassavers.org/showthread.php?t=5036

And MetroMPG is right, spoofing the 02 sensor can compromise your emissions.

CarloSW2
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Old 11-05-2007, 07:07 PM   #5
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Thanks for all the good adivce, information and honest opinions.

I agree that leaning the A/F will increase unwanted emissions, it seems that the ECM wont let me, anyway.
Most of my driving is 10 miles to work, 10 miles home, about 85% open road.
I am also building a hydrogen generator, hoping to burn only hydrogen, while venting the oxygen. If I can do this, then I'll take a look at leaning the A/F.
Later......
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