I only have a 02 gt. Its got a cai, msd wires, and autolite 606's and im getting 15-16mpg? This cant be right. I have no codes coming up on the reader. Could it just be a dirty maf or bad o2?
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05-12-2010
I only have a 02 gt. Its got a cai, msd wires, and autolite 606's and im getting 15-16mpg? This cant be right. I have no codes coming up on the reader. Could it just be a dirty maf or bad o2?
05-12-2010
or your driving........
05-12-2010
doubtful, 15 mpg is horrific with a GT.Originally Posted by matt5112
05-12-2010
I get 13.3 around town and i got 29.5 on the way back from korey's place doing 75 mph 95% of the time.
05-12-2010
i blame the route's and traffic. I can get up to 19 MPG city if the traffic is light and i'm going to school, but going to work is a different story.
05-12-2010
is there a rule of thumb on how long an o2 sensor is usually good for or not so much?
05-12-2010
about 100k is when the factory recommended replacing things like that. plugs and wires were actually expected to go 100,000
and i'm with matt here, i did DD one night and my DIC got down to 12.9mpg. just the granny gear i guess
05-12-2010
i bought my car with 122k on it is there a way to check if all the routine mantnience was done or not really i get about 17-18 mpg if that helps.
05-12-2010
short of pulling everything out and seeing what brand it is, not that i'm aware of lol. maybe do some profiling? if you bought it from an older lady like i did, it's probably a safe bet that it wasn't done haha. maybe do a carfax on it. if you're worried about it, change your plugs and wires with your next oil change, that's not too expensive. for a lot of the sensors, i'd wait till it throws a code and acts funny. my car started jumping around when i was driving at like 120k, an O2 sensor and an MAF and problem solved
05-14-2010
The gas isn't the greatest either... I always notice when I'm in Michigan I get way better fuel mileage but when I come back to Wisconsin... It drops off a little bit. I can't complain though as of recently, I'm getting between 19-21 MPG in the city and usually top off at 34-35 MPG on the interstate..
Originally Posted by bluegtp91
05-15-2010
When is the last time the car has had a tune up? How many miles on the car? Where are you getting 15 MPG from (DIC or your own math)? As Bio248 said, probably a bad upstream o2 sensor.
You can wait to change it until 100K, but I wouldn't. It's cheap enough to replace sooner than later when you factor in the cost of wasted fuel.
05-16-2010
110k on the car. did wires and plugs at 100k and the DIC is saying 15mpg. Im getting around 200-220 miles per tank.
05-16-2010
What about the o2 sensor? Been replaced?
05-16-2010
Have you checked the cat? Mine was getting bad mileage when it was going. I also agree with the o2 sensor.
05-16-2010
I never replaced a o2 yet. I was thinking about getting a new d/p and replacing the o2's when i did my top swap.
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