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Oxygen sensor & MPG !!!

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Offline Speedracer7c

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Re: Oxygen sensor & MPG !!!
« Reply #15 on: March 23, 2004, 08:49:28 AM »
I filled up today and got 20 mpg my last tank, it was all highway driving though. I've been getting about 15 or so around town lately, I just changed the fuel filter too...anyone else get comparable mileage. Its a 95 2 door 16 valve auto.
93 sammy 5 inch calmini lift 31" ltbs locked rear

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Offline zukmon

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Re: Oxygen sensor & MPG !!!
« Reply #16 on: March 23, 2004, 09:21:36 AM »
Does anyone have one of those A/F ratio LED gauges that hook up to the O2 port? Does it work well? I used to be able to dial it in with the sniffer down at the high school.

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Offline HotRod

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Re: Oxygen sensor & MPG !!!
« Reply #17 on: March 23, 2004, 10:34:41 AM »
Quote
I filled up today and got 20 mpg my last tank, it was all highway driving though. I've been getting about 15 or so around town lately, I just changed the fuel filter too...anyone else get comparable mileage. Its a 95 2 door 16 valve auto.

Same Ride, same milage.
Thinking about putting in a fuel tank out of a 4dr .
4 xtra gallons I herd.
95 2dr Geo Tracker with Calmini 6"inch combo lift, 32'inch BFGs M/Tlocked and loaded--D.D is my 06 Racy RED Aerio SX AWD

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Offline Agent Orange

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Re: Oxygen sensor & MPG !!!
« Reply #18 on: March 23, 2004, 11:32:26 AM »
huh i didn't know some carbed engines came with O2 sensors. why is that ? is there a servo motor adjusting the fuel mixture ?

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Offline Bobzooki

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Re: Oxygen sensor & MPG !!!
« Reply #19 on: March 24, 2004, 02:16:35 AM »
Hmm.  If you HAVE an O2 sensor, and it's not being used, you can use it to adjust your mixture.

You may need to add power to the heater element - I believe that when your mixture is just right, the O2 sensor puts out 0.7 volts.  You'd obviously need a digital meter, too.
Bob

Tahoe 24' Fish-N-Fun Tritoon
115 HP Mercury outboard

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Offline Mac0

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Re: Oxygen sensor & MPG !!!
« Reply #20 on: March 24, 2004, 12:28:31 PM »
  I'm not sure what was adjusting it - I don't have the old carb anymore.
Bobzooki - I'm not sure what you just said !!

In the last few day's I have played with it ( The Mixture screw)  drove it all day yesterday and had a shop cut out my 'Cat'. It seems to be running pretty good now. It will still run on when I turn the key off some times and I need to drop the clutch in a gear to stop it. I haven't checked the MPG yet but looking at the guage I may have slowed it down a bit. It also blows black smoke at idle - oh well -- better than before.

Thanks again for all the help.