Tut

I bought my daughter a 1991 Maxima with 120,000 miles, a real cream puff owned by an older couple (really!) I did all the regular maintenance, plugs, wires, air filter, belts, hoses, timing belt, etc. but the car gets HORRIBLE gas mileage.....under 14 mpg in town. What do I need to check? BTW, it runs smooth, no hesitation and starts good as well...and no gas leak that I can see or smell...

Thanks,

Tut

 

internetautomart

check the driver and the driving distance.
I was getting 14s out of mine, because of how far I drove and when I drove.

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Maxus 2008 will be in Chicago in June
All are welcome
Maxus is a gathering of Nissan Maxima enthusiasts from all over the continent.

Tut

I have, and it still stinks! I ran it for a while in the garage last night and I am detecting a gas (not leak, but unburnt) smell. I'm guessing dirty injectors.

Tom 2000

Did you check/change the O2 sensor?

My car has 190,000 miles and I can still get at least 21 MPG in mostly city driving.

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Tom '92 GXE

Tut

I have not...but I will. Shouldn't the check engine light come on if it is defective?

Thanks for your advice!

 

internetautomart

nope, it dam near never comes on.

__________________
Maxus 2008 will be in Chicago in June
All are welcome
Maxus is a gathering of Nissan Maxima enthusiasts from all over the continent.

Tut

That figures....can I test it or do I just shell out $75 and assume it is toast and replace it?

Tom 2000

I'm not sure how to test an O2 sensor, but I agree that the Check Engine light never comes on. About 6 years ago, 2 of my fuel injectors went out. Car was obviously shaking and running really bad, but I still didn't get a check engine light.

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Tom '92 GXE

Tut

Thanks, I guess I'll be crawling under the darn thing.....

internetautomart

yup, there is a test procedure in the FSM, using the ECU.
and I have them available for less than that

__________________
Maxus 2008 will be in Chicago in June
All are welcome
Maxus is a gathering of Nissan Maxima enthusiasts from all over the continent.

 

Tut

I don't have access to a factory service manual and I'm guessing the ECU is an electronic control or computer unit? As this car is new to me I am unfamiliar with it at the moment as far as the electronics are concerned. Is there a place to plug an OBD or OBD II reader? I am not going out to look now.....it is 20 degrees and blowing snow!! How much for your sensor?

internetautomart

1. there is a link in the stickies with a pdf version of the FSM
2. there is a port to pull codes with a scanner, but no cheapo scanner can pull them.
3. about $60

__________________
Maxus 2008 will be in Chicago in June
All are welcome
Maxus is a gathering of Nissan Maxima enthusiasts from all over the continent.

Tut

Thanks for the info on the link...and I actually have access to brand spank-me-new advanced scanner which will do everything but the dishes.

internetautomart

I doubt it will read the max. only high end (think $2k+) have the connectors for it.
Personally I use the MT2500 from snap-on which even used these days goes for $800

__________________
Maxus 2008 will be in Chicago in June
All are welcome
Maxus is a gathering of Nissan Maxima enthusiasts from all over the continent.

Tut

I should be all set then. The motor pool garage where I work just bought one a couple of months ago and they paid over $3k for the unit.....should do the trick. Thanks for your advice.