Re: Poor Gas Mileage

From: Andy Levy (andylevy@bigfoot.com)
Date: Thu Dec 16 1999 - 18:36:52 EST


I've got the same truck. Since I started tracking my gas in June, I've
pulled about 14.75 MPG, mostly my 13-mile commute. The only time I saw
17 was in May, on a 280-mile round trip in one day, 95% highway and
country roads (pretty flat, no traffic, no radar to evade). Do you
carry a lot of stuff with you, drive it hard, or use 4x4 a lot?

Have you asked a dealer directly if it'll get covered under warranty?

jbe@micron.net wrote:
>
> sorry long, but informative...
>
> I have a '99 Dak 318 4x4 auto CC that has always got pretty low gas
> mileage
> so through performance mods and such my goal was to increase performance
>
> and MPG at the same time. Well after doing TB, cold air intake,
> headers, catback,
> ignition, electric fan, and synthetic oil, my performance went up quite
> abit :)
> however from day one (when the truck was new) my gas mileage has never
> ever
> changed. Always around 14MPG or so (lots of highway), even with all the
> mods.
> Now this always bothered me that the mileage has never changed.
>
> Today I spoke with a former Dodge engineer about this problem. He
> stated
> that the reason some Dak's get 17-20MPG and others get 11-14MPG
> (or anywhere in between) is a serious mismatch problem between the
> computer and the O2 sensor. Which is why Dodge has lowered the MPG
> numbers on the 97-99 Daks ever year they wre produced. He said the
> problem
> seems to occur in about 1 out of every 10 Dak's or so. Seems that the
> O2 sensor
> is not putting out the correct signal to tell the computer to lean out
> the engine enough
> for good MPG.
>
> Yikes, I said sounds like mine. What can I do? He said you can test
> the O2 sensor
> and make sure the voltage range output is between 0.0 to 1.0 Volts and
> not something
> like 0.2 to 0.8. He said getting an O2 sensor to work good is key to
> helping the problem.
>
> Can I take it in for warranty repair? No he said, Dodge dealer will say
> your mileage and
> O2 sensor readings are in spec. You will most likely have to buy one
> aftermarket,
> and then bitch at Dodge reps for good measure.
>
> comments??? added info from anyone????
>
> Ja

-- 
-andy

http://home.twcny.rr.com/andylevy/ --- andylevy@bigfoot.com ---------------------------------------------------------------- Remember, amateurs built the ark. Professionals built the Titanic. ----------------------------------------------------------------



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