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  • SN95 4.6L Mustang Tech

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

  • Thread starter Thread starter POS96GT
  • Start date Start date Dec 15, 2003
P

POS96GT

Founding Member
Jul 29, 2002
266
0
0
Waco, Texas
Dec 15, 2003
#1
  • Dec 15, 2003
  • #1
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 Member
May 12, 2003
1,802
0
0
Los Angeles, CA
Dec 15, 2003
#2
  • Dec 15, 2003
  • #2
new o2 sensors?..spark plugs ?... dunno...
 

Beau

Founding Member
Jan 29, 2000
3,050
0
0
San Diego
Dec 15, 2003
#3
  • Dec 15, 2003
  • #3
maybe you all of a sudden went super rich with your mixture for some reason..maybe the comp crapped out?
 

wms004

Founding Member
Jan 15, 2002
2,864
2
49
Los Angeles
Dec 15, 2003
#4
  • Dec 15, 2003
  • #4
Blk02stang said:
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
Click to expand...
try getting tuned.. clean your K&N.. and some new plugs if yours have some miles on them.. i'd start there
 

01BlkGT

Founding Member
Jan 22, 2002
1,015
0
36
ATX
Dec 16, 2003
#5
  • Dec 16, 2003
  • #5
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

Banned
May 12, 2003
952
0
0
TEXAS
Dec 16, 2003
#6
  • Dec 16, 2003
  • #6
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
 
P

POS96GT

Founding Member
Jul 29, 2002
266
0
0
Waco, Texas
Dec 16, 2003
#7
  • Dec 16, 2003
  • #7
01BlkGT said:
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.
Click to expand...

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

KJ Hoppus

New Member
Mar 18, 2003
1,008
0
0
Elk Grove CA
Dec 16, 2003
#8
  • Dec 16, 2003
  • #8
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.
 
P

POS96GT

Founding Member
Jul 29, 2002
266
0
0
Waco, Texas
Dec 16, 2003
#9
  • Dec 16, 2003
  • #9
KJ Hoppus said:
bump the air pressure up in the front, and take all the extra crap out of the trunk and inside
Click to expand...


?????????????????????????
 

Sam98

Founding Member
Mar 15, 2002
1,625
1
0
Albuquerque, NM
Dec 16, 2003
#10
  • Dec 16, 2003
  • #10
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...
 
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