gass millage

[Guest traillooker]

I have been checking my millage over the past months and was averageing 17 to 18 MPG. Now all of the sudden it has droped to 10 to 12 MPG. My pathfinder is a 97 4wd with 120K miles. I have never replaced the front two 02 sensors. Could that be the problem?

[vengeful]

Do you have any Diagnostic Trouble Codes? Is your MIL illuminated?

[Guest traillooker]

I do not have any codes that I know of and there is no MIL illuminated.

[vengeful]

Then your O2 sensors are fine.

 

Check the timing. Has the timing belt been replaced yet?

 

Check and clean the fuel injectors, change the fuel filter, change the spark plugs, wires, distributor cap and rotor.

[Guest traillooker]

I have done all of these thing except wires.

[Guest traillooker]

One other thing I haven't done is clean the fuel injectors.

[vengeful]

How about the differential oil, transfer case oil, and transmission fluid?

[Guest traillooker]

Yes those have been done also. Did all of that myself.

[vengeful]

Has your driving style changed recently? Have you been doing more city than highway lately? Did you fill up with E85? Pathfinders are NOT flex-fuel vehicles and CAN NOT run properly on E85.

 

Tire pressures all OK?

[zonianbrat]

How about your spare tire pressure??? Do you have any stickers?

[yar1]

Check the timing. Has the timing belt been replaced yet?

 

so poor mileage could be a sign the timing belt needs replacement?

[vengeful]

Absolutely Not. The timing belt gives no warnings before it breaks. Your odometer (and maintenance history) is the only sign that your timing belt needs to be replaced. It is due every 105k miles.

 

However, if the timing is off, you will get poor fuel economy.

[90seven]

How about your spare tire pressure??? Do you have any stickers?

How is this relevant? Haha

[vengeful]

How is this relevant? Haha

He was being facetious.

[SaKaNa]

I just wanted to mention that I'm at like a record personally... I've gone 240 miles and still have 1/4 a tank of gas! And I was doing 85 MPH on I-76 with the full tank a few days ago! And I drive the thing like a sports car...

[vengeful]

That's pretty good.

 

I was at 160 miles and 1/2 tank when I last glanced at it.

[max_stryker]

i get 150 to the tank....maybe if i drive nice and dont keep it in 1st 4lo all day long i can squeeze a lucky 200 out of it

[94extreme]

i get 150 to the tank....maybe if i drive nice and dont keep it in 1st 4lo all day long i can squeeze a lucky 200 out of it

keep rpms under 3000 and the milage increases dramatically.

[navygz19]

i get 150 to the tank....maybe if i drive nice and dont keep it in 1st 4lo all day long i can squeeze a lucky 200 out of it

OMG that's horrible max...I couldn't afford that!

[max_stryker]

which is why my truck has been sitting for nearly 4 months and i drive the wd's around