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Old 02-11-2011, 11:55 PM   #1 (permalink)
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Join Date: Dec 2010
Location: Brevard, FL
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93civicvx - '93 Honda Civic VX
Team Honda
90 day: 52.33 mpg (US)
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2O2orNOT2O2 ?

If my '93 VX is getting about 45 mpg WITHOUT the O2 hooked up - runs like crud with it hooked up - appears to be a bad O2, but as someone here pointed out, it could be an wiring issue... What is the gain running with a working O2 ?
Relative question, I know, but all things considered, if I spring for a new O2 $$$ ( if it proves to be defective after TS'ing the wiring and finding the wiring good ), what could I EXPECT to gain mpg wise ? 25 miles ea way to work, flat land, 3/4 55 mph hi-way and 1/4 city driving - East Coast of FL...

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Old 02-12-2011, 08:53 AM   #2 (permalink)
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Join Date: May 2009
Location: Charlotte NC / York SC
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05 DMax - '05 Chevrolet 2500HD
90 day: 18.48 mpg (US)
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To test it, use needles to tap into the wires. Add wire long enough to get through the door to the cab. Oh, tape the needles up so nothing shorts out.
You should see the voltage changs from near 1 to near 4 as it warms up. (Maybe I have it backwards)
Point is if it doesn't change, its a bad sensor.


I can't understand why my MPG's are so low..........
21,000lb, 41' Toy Haulers are rough on FE!
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