Over head console MPG read out incorrect?

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Feb 28, 2013 | 11:02 AM

No4x4Yet

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Joined: Jul 2010

Posts: 997

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From: Long Island NY

Year: 2000

Model: Cherokee

Over head console MPG read out incorrect?

I installed the overhead console cuz my jeep didnt have one. Ive done something to help my MPG. O2 sensors, 703 injectors, better driving habits. The OHC reads and improvement but when I calculate it its pretty much the same. OHC last time said 17mpg, but calculating it got 15mpg. Is there some way to recalibrate MPG readout? Or is there something I need to look at thats not working?

Feb 28, 2013 | 02:14 PM

The Rooster

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Joined: Feb 2011

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From: Bergen County, New Jersey U.S.A.

Year: 1990 Laredo

Model: Cherokee

Engine: 4.0 Inline 6 Renix

Do you have stock size tires?

Feb 28, 2013 | 05:30 PM

No4x4Yet

Thread Starter

Senior Member

Joined: Jul 2010

Posts: 997

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From: Long Island NY

Year: 2000

Model: Cherokee

Have 31" tires but I have the right speedo gear. Even if that were case the difference in mileage isn't that much the it should be 2-4 mpg difference. The increase is only a small percent.

Feb 28, 2013 | 07:50 PM

No4x4Yet

Thread Starter

Senior Member

Joined: Jul 2010

Posts: 997

Likes: 1

From: Long Island NY

Year: 2000

Model: Cherokee

The reason I asked is I changed the O2s last weekend and my mpg readout went from 15 to 17 but the calculations are the same. Even of the tire were messing the number if think it still see a gain.