Very Bad Fuel Economy.. OR?
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Joined: Jun 2013
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From: Phoenix,Arizona
Year: 1989
Model: Cherokee
Engine: 4.0L
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Joined: Apr 2010
Posts: 1,575
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From: Florida
Year: 2000
Model: Cherokee(XJ)
Engine: 4.6 Re-Built Golen, 68-200-4 Comp Cam
One time I decided to splice on a new 02 sensor connector for my upstream and got the wiring wrong. I had the ground going to the sensor signal.
Even with that I got 10 MPG and you could smell unburned gas fumes if you were anywhere within 20 feet of it. If I stepped on it at all pure black smoke would come out of the tail pipe like it was a diesel.
Since I don't think you have those symptoms, and you have half the gas mileage I did, I personally think your gas is either leaking out somewhere or being stolen. If you rain anywhere near as rich as I did you would know too much fuel is being put into the chambers, but since you have half the gas mileage and none of the symptoms I think it's safe to assume there is a leak somewhere.
Have you tried taking a lighter and running it down the fuel lines while it's running?
Even with that I got 10 MPG and you could smell unburned gas fumes if you were anywhere within 20 feet of it. If I stepped on it at all pure black smoke would come out of the tail pipe like it was a diesel.
Since I don't think you have those symptoms, and you have half the gas mileage I did, I personally think your gas is either leaking out somewhere or being stolen. If you rain anywhere near as rich as I did you would know too much fuel is being put into the chambers, but since you have half the gas mileage and none of the symptoms I think it's safe to assume there is a leak somewhere.
Have you tried taking a lighter and running it down the fuel lines while it's running?
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Joined: May 2013
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From: Vancouver
Year: 1998 and 1988
Model: Cherokee
Engine: 4.7
CF Veteran
Joined: Apr 2010
Posts: 1,575
Likes: 4
From: Florida
Year: 2000
Model: Cherokee(XJ)
Engine: 4.6 Re-Built Golen, 68-200-4 Comp Cam
Thread Starter
Member
Joined: Jun 2013
Posts: 130
Likes: 0
From: Phoenix,Arizona
Year: 1989
Model: Cherokee
Engine: 4.0L
CF Veteran
Joined: Apr 2010
Posts: 1,575
Likes: 4
From: Florida
Year: 2000
Model: Cherokee(XJ)
Engine: 4.6 Re-Built Golen, 68-200-4 Comp Cam
CF Veteran
Joined: Oct 2011
Posts: 4,440
Likes: 3
From: Seal Beach, CA
Year: 1996
Model: Cherokee
Engine: 4.0 HO Straight Six
Thread Starter
Member
Joined: Jun 2013
Posts: 130
Likes: 0
From: Phoenix,Arizona
Year: 1989
Model: Cherokee
Engine: 4.0L
CF Veteran
Joined: Oct 2011
Posts: 4,440
Likes: 3
From: Seal Beach, CA
Year: 1996
Model: Cherokee
Engine: 4.0 HO Straight Six
That's not unheard of then. You aren't in as deep of **** as we thought. You can certainly do a little better than that with a little TLC but after all, you aren't leaking fuel or getting robbed so that's good
Thread Starter
Member
Joined: Jun 2013
Posts: 130
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From: Phoenix,Arizona
Year: 1989
Model: Cherokee
Engine: 4.0L
Yeah but what gets me is, at 139 miles my gauge was reading empty. filled it up and didn't even go to the F. so when my gauge reads empty does that mean i can still go another 60 miles before i should fill up?
