Bad gas mileage!!

[xmodster3o3]

I have a 91 X with 173,000 miles on it, I have noticed a sudden drop in gas mileage, I was just wondering if anyone has any ideas to what could be causing this. I have tried nothing as of yet, and i'm looking for ideas. I just changed the air filter about a two weeks ago.

 

[Blee1099]

Any Check engine codes or anything? Have your driving habits changed or have you use 4WD recently if equipped?

 

[aldive]

How old are the O2 sensors?

 

[xmodster3o3]

As old as the truck its self I guess, should they be changed regularly.

 

[Blee1099]

Originally posted by xmodster3o3
As old as the truck its self I guess, should they be changed regularly.

Yeah.. there normal life is about 40,000 - 60,000 miles.

 

[aldive]

Not necessarly, however, they can cause mileage drop problems when they are bad or going bad.

I would check their function.

Good luck......

 

[xmodster3o3]

Only once have I ever seen my engine light on, it was about 2 months ago and it turned off after 5 min and a restart. I am going to look into the O2 sensor thanx for the help guys.

 

[Blee1099]

Originally posted by aldive
Not necessarly, however, they can cause mileage drop problems when they are bad or going bad.

I would check their function.

Good luck......

I believe most Mechanics & Ford recommend changing the 02 sensors at every 60,000 miles.

 

[aldive]

Originally posted by Blee1099
I believe most Mechanics & Ford recommend changing the 02 sensors at every 60,000 miles.

I bet, they are selling them.

I know quite a few people with welll over 150k with original sensors.

I have 3 original ones at 85k.

 

[EliteConcept]

winter gas leads to worse gas milage.

 

[StickmanC]

I have always noticed a drop in mileage in the winter. Just took a 208 mile trip running 72-74 mph up and back and only got 17.9 mpg highway. Since this mileage check I have only 150 miles on this tank and only have a half tank left I am going to watch it carefully, something don't seem right if it drops below 14 mpg. I have never seen it lower than that.

 

[StickmanC]

I couldn't stand it, I went down and filled up phew! 16.05 mpg, I'll take that in the winter!

 

[GaSouthern1]

dont feel too bad, I am getting 14 mpg at 80mph (2300 rpm) in my dodge. I am getting about sick and freaking tired of it, I am gonna have to work on the intake and exhaust type things soon or else I wont be able to afford this crap. Gotta love a v8.

 

[X~FACTOR]

I loose about 2 mpg during the winter time. Mainly because I kinda neglect basic maintenance during the cold season. Why? Because its TOO DAMN COLD! I remember last year I found both rear tires were at 26 psi.

 

[Blee1099]

Originally posted by aldive
I bet, they are selling them.

I know quite a few people with welll over 150k with original sensors.

I have 3 original ones at 85k.

I agree with you.. I had to replace my 02 in my Explorer at about 60,000 but the 02 sensors in my Blazer are still original at 120,000 miles.

 

[xmodster3o3]

My explorer beats all those I have over 170,000 miles with the same O2's. Where can I find the location of the O2 sensors."91 explorer XL"

 

[Blastingcaps]

O2 sensor

the sensor is in the exaust on the passenger side down near the junction of the cat converter. be4side the bell housing of the tranny.