HELP: Gas Milage has dropped from 19 MPG to 13 MPG....

[POS96GT]

I had been getting about 19 MPG but now 2 tanks in a row I am getting a little less than 13 MPG with normal driving. I just don't know where to startsince it was such an instant thing. The car is listed in the sig below. any help will be greatly appreciated.

Thanks

 

[stallion98gt]

new o2 sensors?..spark plugs ?... dunno...

 

[Beau]

maybe you all of a sudden went super rich with your mixture for some reason..maybe the comp crapped out?

 

[wms004]

I had been getting about 19 MPG but now 2 tanks in a row I am getting a little less than 13 MPG with normal driving. I just don't know where to startsince it was such an instant thing. The car is listed in the sig below. any help will be greatly appreciated.

Thanks

try getting tuned.. clean your K&N.. and some new plugs if yours have some miles on them.. i'd start there

 

[01BlkGT]

Has the temp changed drastically where you are at? Like someone mentioned, the tune could be throwing things off. Another thing you could try is to reset the computer and see if that helps get things back in order.

 

[dkshadow]

Ive been getting 13mpg since the first day I got the car...


Its all city though, if I get on the highway I can stretch it out to 19 mpg

 

[POS96GT]

Has the temp changed drastically where you are at? Like someone mentioned, the tune could be throwing things off. Another thing you could try is to reset the computer and see if that helps get things back in order.

maybe like 10 degrees colder in the past 2 weeks......is that enough to throw evrything off?

 

[KJ Hoppus]

clean the K&N, new plugs, Fuel Filter, bump the air pressure up in the front, and take all the extra crap out of the trunk and inside. that should get you a few back no problem.

 

[POS96GT]

bump the air pressure up in the front, and take all the extra crap out of the trunk and inside

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[Sam98]

I usually lose 2 MPG due to ethanol in the gas during the winter, but not 6...

It sounds like you have a leak somewhere...